past simple or continuous

Gap-fill exercise
By Juan Ignacio Montorio

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

1. The phone (ring) while we (watch) the DVD.
2. I (sit) on the bus when I (receive) your text message.
3. He (become) ill while he (visit) his grandparents.
4. She (not do) her homework when I (see) her in the library.
5. It (start) to snow while they (cycle) to school.