1. 根据语境从方框中选择恰当的短语填空，有的需要变换形式。

because of, succeed in, have a great time, be full of, look forward to

1. （1） The box is heavy. Itbooks.
3. （2） Lily was late for workthe heavy traffic this morning.
5. （3） After the three hours' climbing, wegetting to the top of the mountain.
7. （4） Qingdao is a nice city. I amvisiting it soon.
9. （5） The children went to the zoo yesterday and all of themthere.