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.