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 CO 2 when they grow,so they can make CO 2 ______ (little) in the air. |
1年前1个回答
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你能帮帮他们吗