Question

Fill in the blank with the most appropriate word.
We will work on the computer ____.

• A. when he will come back
• B. by the time he came back
• C. until he comes back
• D. until he will come back

Answer 1

The correct option is C until he comes back

Let’s examine the sentence: “We will work on the computer ____.” The use of ‘will’ indicates that the tense of the sentence is future. Hence, the part to come in blank cannot be of past tense. This rules out Option B as it uses a verb of past tense, i.e. ‘came.’ Until means 'up to the event mentioned.’ After until we use present tenses to talk about the future. This rules out Option D that uses ‘will’ with ‘until.’ "When" doesn't really refer to a specific time or period and, therefore, isn't an appropriate use of the word. This rules out Option A. We are left with Option C which is the correct answer.