跟别人说再见时,应说:A.Hello! I’m Sam. B.Good bye.
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
Danny is writing postcards ____his mother. A. to B. on C. in