An early start to flu season moves up vaccination timing

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

B2. 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

Fill in the blank (dropdown)

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 · Fill in the blank (dropdown)

   Choose the correct option for each blank.

   Because flu activity began early, people ___ their vaccination plans.

   Choices for blank 1

   1. may need to reconsider
   2. may needing reconsider
   3. may to reconsidering
   4. may reconsidered
   Check answers and explanations

   Blank 1

   may need to reconsider

   The modal “may” correctly expresses a possible consequence.

2. Question 2 · Fill in the blank (dropdown)

   Choose the correct option for each blank.

   The article suggests that vaccination timing ___ by region.

   Choices for blank 1

   1. can vary
   2. can varies
   3. can varying
   4. can to varied
   Check answers and explanations

   Blank 1

   can vary

   The present-tense modal construction correctly describes possible variation.

3. Question 3 · Fill in the blank (dropdown)

   Choose the correct option for each blank.

   Public-health experts need ___ the variant’s behavior carefully.

   Choices for blank 1

   1. to watch
   2. watching to
   3. watched to
   4. to watching
   Check answers and explanations

   Blank 1

   to watch

   “Need” is followed by a to-infinitive in this sentence.

4. Question 4 · Fill in the blank (dropdown)

   Choose the correct option for each blank.

   If the virus changes, recognition ___ more difficult.

   Choices for blank 1

   1. may become
   2. may became
   3. may becoming
   4. may to become
   Check answers and explanations

   Blank 1

   may become

   The first conditional uses “may become” for a possible result.

5. Question 5 · Fill in the blank (dropdown)

   Choose the correct option for each blank.

   The available facts ___ that the mutation caused the early start.

   Choices for blank 1

   1. have not established
   2. has not establish
   3. have not establishing
   4. had not establishes
   Check answers and explanations

   Blank 1

   have not established

   The present perfect negative correctly describes what evidence has not shown.

6. Question 6 · Fill in the blank (dropdown)

   Choose the correct option for each blank.

   The West’s early activity is a reminder that seasonal patterns ___ change.

   Choices for blank 1

   1. can
   2. can to
   3. can changing
   4. can changed
   Check answers and explanations

   Blank 1

   can

   “Can” takes the base verb to express general possibility.

7. Question 7 · Fill in the blank (dropdown)

   Choose the correct option for each blank.

   The early start has already ___ the discussion about flu protection.

   Choices for blank 1

   1. changed
   2. change
   3. changing
   4. changes
   Check answers and explanations

   Blank 1

   changed

   The present perfect requires the past participle “changed.”

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.