Complete each sentence with "when" or "while"

01 Đề bài:

D. Complete each sentence with "when" or "while".

(Hoàn thành mỗi câu với "when" hoặc "while")

1. Martina was looking for a job ___________ I met her for the first time.

2. The mountain climbers were resting __________ the storm began.

3. My phone rang six times __________ I was working on my project.

4. ___________ he was visiting Quito, Justin practiced his Spanish.

02 Bài giải: