II. Put the verbs in brackets in the correct verb tense or form.
1. They usually (paint) _________________ their house blue.
2. She (help) _________________ her mother with the housework now.
3. My father (buy) _________________ a new car two months ago.
4. Mrs. Hong (teach) _________________ us English last year.
5. I (call) _________________ you as soon as I arrive in Hue.
6. Nuclear power (use) _________________ for heating in the future by them.
7. Tomorrow, a film on energy sources (show) _________________ by scientists.
8. The Greens (be) _________________ to many countries in the world so far.
9. We (spend) _________________ our summer vacation in Ha Long Bay last July.
10. Our teacher (explain) _________________ to us how to use the printer already.