I won’t have anyone _____ in here. Whoever breaks the regulation will get punished.

Is that Mr．Smith over there? —– No, it _____ be him — I am sure he is much taller.

There was such a long queue for coffee at the interval that we _______ gave up

Mrs Brown was much disappointed to see the washing machine she had _____ went wrong again

Shall I tell Ann how to improve for painting?—Yes, but ____ of suggestions may discourage her