Question

用单词的适当形式填空。

1. My aunt _____ (teach) me to play the violin when I was a child.
2. Look! The people in the river ______ (swim).
3. Tree-planting Day is on the ______ (twelve) of March every year.
4. Stephen spends about half an hour ______ (swim) every Saturday afternoon.
5. I don't like travelling by train. I think it's ______ (safe) to travel by train.
6. —I'm tired. 
    —So am I. We'd better stop ______ (walk) and have a rest.
7.  Plants need CO₂ when they grow, so they can make CO₂ ______ (little) in the air.

Answer 1

1. taught
2. are swimming
3. twelfth
4. swimming
5. unsafe
6. walking
7. less