【推荐1】______ Mike didn’t turn up at the meeting yesterday is unknown. (用适当的词填空)

【推荐2】The exhibition tells us __________ we should do something to stop air pollution. (用适当的词填空)

【推荐3】My mother suddenly fell ill. That’s ________I didn’t appear. (用适当的词填空)

【推荐1】单句语法填空
1. According to Dr. Hoch and his team, autumn leaf colors might be able to protect the leaves from sun damage or frost ______(injure).
2. Many of us are suffering from colds because of the ______ (normal) weather.
3. Natalie Doan, 14, has always felt very ______ (luck) to live in Rockaway because she can see the ocean and hear the waves from her house.
4. I would rather ______ (laugh at) than quarrel with him.
5. I was late for the appointment. That’s ______ I met an old friend on the way.
6. In spring, some people get ill because of eating some kinds of wild vegetables which are not fit ______ (eat).
7. ______ you can see from the picture, in some ways my brother and I look like each other.
8. If ______ (take) good care of, the bird can live as long as twenty years.
9. I could see that they were all very nervous, ______ (eye) me up and down.
10. She was stupid enough ______ (lose)weight only by going on a diet.

【推荐2】Flowers in a glasshouse may grow fast, but that’s not______the flowers belong. (用适当的词填空)

【推荐3】Many teenagers don’t pay attention to their sitting posture—that’s ___________ they suffer from short sight. (用适当的词填空)