Multiple choice

Directions: Fill in the blank.

When my uncle entered the house, I _________ writing a letter.

  1. was

  2. would be

  3. had been

  4. should be
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is clear in the sentence that when the uncle entered the room, the letter writing activity was also under the process. To show this parallel continuity of two actions of the past, we use past continuous tense. Hence, (1) is the correct answer.

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