-- Could you tell me something about the boy who helped you just now? --- Sorry, I know nothing about him. He is a . A. stranger B. neighbor C. friend
--- Do you know if Kitty ______ shopping this afternoon? --- I’m not sure. But if she , I will let you know.
---What made you so_________? ---Oh, Mr Wu told us a funny story and it made us _________.
____________ the teachers is about 300 in our school and it is becoming_____________.
The earthquake ______ when I _______some cleaning.
---Let’s go hiking __________ staying at home, shall we? --- A good idea.