My parents are always strict ____ me.
— Would you please tell us _____? —In half an hour, I think. A. when will he come back B. when he will come back C. when he came back
—Mrs White always helps others _____ she is very busy. —She is so kind. A. but B. because C. although
—The population of the world ____ still ____ now. —So it is. A. are; growing B. will; grow C. is; growing
—It smells terrible. What has happened here? —Look, there is a chemical factory_____ much waste gas. A. pour B. pouring C. poured
In our class _____ of the students _____ girls. A. two fifths; are B. second fifth; are C. two fifths; is