It is good ________（你帮我学英语）.

What he did is ____ ____ 　　 （与个性不相称）.

The foreigner doesn't know ___ ____（汉字）.

I'm ________（一点也不怕）.

The railway will be completed in ________（至多6个月）.

We need ________（至少50名工人）.

They were in the same boat. In other words, they ________（遭遇类似的命运）.

You must ____ ____ _____(追上)your classmates in study.

We need to _____ ______ ______（履行契约).

Let's _____ _____（约会）at 5∶00.