From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences.
By the time they arrive, we …………the work.
-
shall have finished
- could have finished
- will finish
- have finished
The correct answer is: A
Explanation
The sentence is describing an action that will be completed before another action in the future, which calls for the future perfect tense. The future perfect tense is formed using "shall have" or "will have" + the past participle of the verb. In this case, the correct form is "shall have finished."