-_______students are there in your class, Mr Li? -Fifty.
--Would you like ________ to eat? --No. thanks. I’d like ________ to drink.
——Where are the Black family? ——They ________ the new zoo.
——There are many ________between them. —— Yes. ________ people think ________.
——Our math teacher has ____hair.
——Tom has____curly hair.