Was Kelly late for the meeting —– Yes, the meeting _____ for 10 minutes when he_____ to the school.

I wouldn’t manage to do it___ you had explained how.

A lot of people ______ the theory thatacupuncture can produce chemicals in the body which reduce pain.

The audience was _____ very young children so there was a lot of noise while the concert was going on.

We’re doing a lot to protect our environment, but it is not good enough. —So we should try______ to look after it.