用所给动词的适当形式填空
Look, there are so many people over there. What ____(happen)?
It’s seven in the morning. It’s time for us ____(go) to school.
Look at the clouds in the sky. I think it ____(rain).
___(be) everyone here?  Yes, Let’s ___(start) now.
He ___(be) be fifty years old next month. But he ___(look) so young.
Teachers’ Day ___(come) . And we ___(plan) to buy some flowers for Mrs. Li.
My mother usually ____(shop) for food on Sundays.