The water in this river is harmful because It’s a ______ river.
— Must we go to see a doctor at once when we have the flu?—No,_____.A. we mustn’tB. we shouldn’tC. we don’t have to
There____ a baseball game between Class Two and Class Three tomorrow.A. will haveB. is going to beC. are going to be
— The flu is becoming terrible these days.—So we ____ go to crowded places.A. must B. should C. shouldn’t
— The boy is good at making model planes.—How clever! Did he learn by_____?A. him B. them C. himself
—Hello. May I speak to Mr. Zhang, please?—Sorry, he is not in. Can I ___ a message?A. leave B. take C. pass