How to Limit Rat Numbers? Train Humans

Study the questions and tasks

Work through the material below, or start the interactive practice above to complete an attempt. Try the exercises before opening any answer or transcript sections, then use them to review your work.

Practice level

C2. Try this level if you can follow the instructions and understand most of the language; choose an earlier level if you need more support.

Question formats

Single choice

How to approach this practice

Read the complete sentence and notice the subject, verb form, time reference and word order before answering.

1. Question 1 · Single choice

   Choose one answer.

   Choose the sentence that uses inversion correctly for emphasis.

   1. Only after the visits residents understood the problem.
   2. Only after the visits did residents understand the problem.
   3. Only after the visits residents did understand the problem.
   4. Only after the visits understood residents the problem.
   Check answers and explanations

   Answer

   Only after the visits did residents understand the problem.

   Negative-fronted inversion requires auxiliary placement before the subject.

2. Question 2 · Single choice

   Choose one answer.

   Choose the most precise concessive construction.

   1. Although poison is repeatedly used, rats continue thriving.
   2. Despite poison is repeatedly used, rats continue thriving.
   3. Although poison repeatedly used, rats continue thriving.
   4. In spite poison is repeatedly used, rats continue thriving.
   Check answers and explanations

   Answer

   Although poison is repeatedly used, rats continue thriving.

   “Although” appropriately introduces a contrast between repeated poison use and continuing rat growth.

3. Question 3 · Single choice

   Choose one answer.

   Choose the sentence with correct subjunctive usage.

   1. Officials recommend that residents adopts new practices.
   2. Officials recommend that residents adopted new practices.
   3. Officials recommend that residents adopt new practices.
   4. Officials recommend residents to adopt new practices.
   Check answers and explanations

   Answer

   Officials recommend that residents adopt new practices.

   The mandative subjunctive uses the base verb after “recommend that.”

4. Question 4 · Single choice

   Choose one answer.

   Choose the correct reduced relative clause.

   1. Residents taking into alleys observe the problem directly.
   2. Residents taken into alleys observe the problem directly.
   3. Residents took into alleys observe the problem directly.
   4. Residents having take into alleys observe the problem directly.
   Check answers and explanations

   Answer

   Residents taken into alleys observe the problem directly.

   The participial phrase correctly modifies residents who are taken into back alleys.

5. Question 5 · Single choice

   Choose one answer.

   Choose the sentence with accurate modal perfect meaning.

   1. Residents may need to become part of the response yesterday.
   2. Residents may have needed to become part of the response.
   3. Residents must have needed becoming part of the response.
   4. Residents should need to have become part of the response.
   Check answers and explanations

   Answer

   Residents may have needed to become part of the response.

   “May have needed” expresses a possible past necessity without asserting certainty.

6. Question 6 · Single choice

   Choose one answer.

   Choose the grammatically correct cleft sentence.

   1. What the Rangers are attempting is address the problem through education.
   2. What the Rangers are attempting is addressing the problem through education.
   3. What the Rangers attempting is to addressing the problem through education.
   4. What are the Rangers attempting is addressing the problem through education.
   Check answers and explanations

   Answer

   What the Rangers are attempting is addressing the problem through education.

   The cleft construction correctly foregrounds education as the program’s central strategy.

7. Question 7 · Single choice

   Choose one answer.

   Choose the sentence with correct parallel structure.

   1. The initiative seeks to educate residents rather than merely informing them.
   2. The initiative seeks educating residents rather than merely informing them.
   3. The initiative seeks to educate residents rather than merely to inform them.
   4. The initiative seeks educate residents rather than merely informing them.
   Check answers and explanations

   Answer

   The initiative seeks to educate residents rather than merely to inform them.

   The coordinated verbs share the same grammatical form after “rather than.”

8. Question 8 · Single choice

   Choose one answer.

   Choose the most idiomatic conditional sentence.

   1. Had poison solved the problem, education would be unnecessary now.
   2. If poison solved the problem, education would have been unnecessary now.
   3. Had poison solve the problem, education would be unnecessary now.
   4. If poison had solve the problem, education would be unnecessary now.
   Check answers and explanations

   Answer

   Had poison solved the problem, education would be unnecessary now.

   The mixed conditional links a past decision with its present hypothetical consequence.

What to review next

After checking an answer, explain the rule in your own words and write a new sentence using the same pattern. Revisit any rules you could not explain.

A focused practice result shows how you did on these tasks. Use several activities across skills to decide what to study next; one practice score does not certify an overall CEFR level.