33. If I_________you would drop in, I would have stayed home waiting for you.
Most of the students near______ Arthur was sitting appeared to be taking notes.So Arthur pretended to do the same.
—We’d better_______ if we want to be on time. —OK.
Was it midnight_________ you fell asleep while reading with the candle still burning?
She spoke very confidently because she wanted to make a great___________ on her employer.
The achievements of the greatest minds in science could never have been reached________ the patient work of hundreds of others.