It is the idea____smiles can get rid of cold ____has been proved by the researchers many times.
--What made your father throw up last night?--I think the large quantities of wine __________.
The manager has to get all these washing machines______.
The air company going from bad to worse, the workers____________ hardly enough to make a living.
--Was Tom there when you arrived? --Yes, but he___________ home soon afterwards.
--What is the model plane like?--Well, the wings of the plane are___________ of its body.