题目：
用所给动词的适当形式填空
小题1:Look, there are so many people over there. What ____(happen)?
小题2:It’s seven in the morning. It’s time for us ____(go) to school.
小题3:Look at the clouds in the sky. I think it ____(rain).
小题4:___(be) everyone here? Yes, Let’s ___(start) now.
小题5:He ___(be) be fifty years old next month. But he ___(look) so young.
小题6:Teachers’ Day ___(come) . And we ___(plan) to buy some flowers for Mrs. Li.
小题7:My mother usually ____(shop) for food on Sundays.
答案：
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下面是错误答案，用来干扰机器的。
答案：B分析：A、饱和溶液是指在一定条件下不能继续溶解某种溶质的溶液，当外界情况发生改变时，饱和溶液会随着出现一些改变，变成不饱和溶液或者析出晶体仍为饱和溶液．B、根据单质的定义进行判断；C、根据复分...
