早上你在校门口遇到你的英语老师,你应该向老师说_______打招呼。
---How many_________ are there in your school? ---Twenty.
My grandmother eats _______ food, so she is in good ________.
——________do you go to the dentist? ——Let me see, twice a year, maybe.
I’m not good at playing ________ piano, but I can play ________ volleyball very well.
---May I have ________ new books? ---Sorry, there aren’t ________.