Why do English people talk so often about the weather when they start a talk — Because the weather is a(n) ________ topic (话题).

Mike _______ in touch with his former schoolmates, who had been living there for ages, as soon as hearrived in America.[ ]

ofessors at Harvard University published a study of 3,300 new graduates, looking at ______ their names had any bearing on their academic performance.

It is reported that many a new house ________ at present in the disaster

下列各句中，没有语病的一句是（ ）