FAA Plans to Phase Out Floppy Disks in Air Traffic Control

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.

   Earlier versions ___ enclosed in flexible sleeves.

   Choices for blank 1

   1. was
   2. were
   3. has been
   4. is
   Check answers and explanations

   Blank 1

   were

   The plural subject requires the past-tense plural form.

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

   Choose the correct option for each blank.

   Choose the correctly formed relative clause: “a technology ___ the computer industry left behind.”

   Choices for blank 1

   1. who
   2. whose
   3. that
   4. where
   Check answers and explanations

   Blank 1

   that

   The object relative pronoun can be omitted in this clause.

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

   Choose the correct option for each blank.

   “Because the disks are removable, a user can ___ one out of a computer.”

   Choices for blank 1

   1. takes
   2. taking
   3. took
   4. take
   Check answers and explanations

   Blank 1

   take

   A modal verb takes the bare infinitive.

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

   Choose the correct option for each blank.

   Complete the sentence: “___ the disks are removable, a user can carry the information elsewhere.”

   Choices for blank 1

   1. Because
   2. Despite
   3. Unless
   4. Whereas
   Check answers and explanations

   Blank 1

   Because

   The clause gives the reason the user can remove and carry a disk.

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

   Choose the correct option for each blank.

   “The systems operate in an environment ___ information needs to be available reliably.”

   Choices for blank 1

   1. which
   2. where
   3. whose
   4. who
   Check answers and explanations

   Blank 1

   where

   The relative adverb refers to the setting or environment.

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

   Choose the correct option for each blank.

   “Information stored in an older format may need ___ accessible.”

   Choices for blank 1

   1. remain
   2. remaining
   3. to remain
   4. remained
   Check answers and explanations

   Blank 1

   to remain

   After “need” in this passive meaning, the infinitive is required.

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

   Choose the correct option for each blank.

   “Equipment designed to work together must still be able ___ information.”

   Choices for blank 1

   1. exchanging
   2. exchange
   3. exchanged
   4. to exchange
   Check answers and explanations

   Blank 1

   to exchange

   The adjective “able” is followed by a to-infinitive.

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.