When I knocked at the door , I heard her______ in the room .A. sings B. singing C. to sing
Reading more helps ________ learn better.
— There is little water left in the bottle, ______? — No, we need to buy some more before we run out of it.
Neither Jam nor his parents _______ places of interest here since they came to China.
Mike _________ English, but now he is better at it than _________ in his class.
I do not doubt ________ win in the race.