Only by practicing a lot _____ our English well enoughto communicate with foreigners.

Do you have anything to say for yourselves—Yes, there is one point _________ we must insist on.

have always regretted ______ harder at school.

Could you meet me at the airport?–I’d like to, but I’m afraid I_________ a very important meeting when you return

not call the manager between 8 and 9 this evening, for he_________ an important meeting then.