I’m not sure if he _____ me . If I ________ , I willgo with you.

I was trying to repair that stupid machine, but I failed.– Well, you_______.

How old can you guess your new English teacher is— It’s hard to say．But I guess him to be _________ between 35 and 40.

下列各句中，没有语病的一项是（ ）

The boy was badly ill．He had to drop out of school because of________．