—Who are your parents talking ____________? —I don’t know. A.for B.to C. on
There _______ many people on the street. A. is B. are C. have
May I ____ some grapes? A. to have B. having C. have
Danny is singing a song ____ my mother. A. to B. for C. across
What would you like _____? A. drink B. to drink C. drinking
Who ____ thirsty? A. am B. is C. are