III. Fill each blank with the correct form of the verb in brackets.
1. When energy ……………(come) from the wind, we call it wind energy. 2. Lan promises she…………….. (finish) her homework tonight.
3. The people in this district……………. (use) solar energy to replace energy from coal at
the moment.
4. Last night, I was watching a documentary when the light………….. (go) out.
5. Do you think robots……………. (replace) human in the future?
6. Tom ……………(be) sick so he couldn’t go on the trip to Washington D.C. yesterday.
7. In my opinion, we………… (not use)coal for cooking and heating in the future.
8. Pete …………(forget) to turn off the TV after watching it last night.
9. I…………. (look) for my car key now. I don’t remember where I left it.
10. Sonya: When…………. you …………. (buy) that Solowheel?
Ben: Last month.
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