Simple Paste / Paste Continuous

EXERCISE 1
Using the words in parentheses, complete the text below with the appropriate tenses, then click the “Answers” button to check your answers.
1. A: What (you,do).……. when the accident occurred?
B: I (try)……. to change a light bulb that had burnt out.
2. A: I (call) .….you last night after dinner, but you (be, not) …… [...]