---Do you mind opening the window?the air inside is not so fresh.--- __________, Mr. Smith is taking a nap (小睡),don’t make him catch a cold.
The more careful you are, ________mistakes you’ll make.
---________does she study English?---________ working with a group.
— I haven’t got a partner _________.— Maybe you can ask John for help.
— My grandpa learns English for two hours every day, _________ he is over70.— Really? We should learn from him.
There are _________ floors in the building and my home is on the _________ floor.