What People Aged 50 and Older Need to Know About Flu Shots

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

C1. 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.

   Manufacturers must make predictions before the flu season ___ fully develops.

   Choices for blank 1

   1. develops
   2. will develops
   3. developing
   4. has develop
   Check answers and explanations

   Blank 1

   develops

   The present simple follows before in this general future-time clause.

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

   Choose the correct option for each blank.

   The specialist explained that RNA vaccines ___ instructions to cells.

   Choices for blank 1

   1. provide
   2. provides
   3. providing
   4. to provides
   Check answers and explanations

   Blank 1

   provide

   The reported explanation requires the present-tense plural verb provide.

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

   Choose the correct option for each blank.

   If later strains differ, adjusting production ___ difficult.

   Choices for blank 1

   1. can be
   2. can being
   3. can to be
   4. can is
   Check answers and explanations

   Blank 1

   can be

   The first conditional uses a present condition and modal result with be.

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

   Choose the correct option for each blank.

   The article emphasizes the importance of ___ production predictions early.

   Choices for blank 1

   1. making
   2. make
   3. to making
   4. made
   Check answers and explanations

   Blank 1

   making

   The preposition of requires a gerund phrase here.

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

   Choose the correct option for each blank.

   Once manufacturers select an antigen, they ___ the material relatively quickly.

   Choices for blank 1

   1. may produce
   2. may produces
   3. may producing
   4. may produced
   Check answers and explanations

   Blank 1

   may produce

   Once introduces a present-time clause; the main clause uses may plus base verb.

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

   Choose the correct option for each blank.

   The technology is described as potentially ___ manufacturers to respond faster.

   Choices for blank 1

   1. enabling
   2. enable
   3. to enabling
   4. enabled
   Check answers and explanations

   Blank 1

   enabling

   The adjective structure potentially capable of requires the gerund responding.

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

   Choose the correct option for each blank.

   The interview recommends that older adults ___ several formulations available.

   Choices for blank 1

   1. consider
   2. considers
   3. considering
   4. to consider
   Check answers and explanations

   Blank 1

   consider

   The mandative subjunctive uses the base form after recommends that.

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.