Peter went to a concert _______ his favourite band played and sang.

－Whatare you going to be when you grow up－I’mgoing to be _____ English teacher in ______ university.

It was proved that the problem __ partly in the air pollution.

Important people don’t often have much free timeas their work________ all their time.

Why was it ______ you were so angry—Because we failed to take part in the basketball match.