Can you follow _______ I say.?A. that B. what C. which
—Have you________visited the old house by the river?—No,________.
Nowadays________of business letters are written in English.
—Have you ever been to Shanghai?—Yes.I________there a few months ago.A.have beenB.wentC.have gone
—Would your younger brother go for a picnic this Sunday?—If I don’t go,________.
It’s said that________of the water around the world________polluted.