At the top of the high mountains, there is very _____ oxygen in the air.
| A．a little | B．little | C．a few | D．few |
---Could we buy a piano, Jack?
---I’m afraid there ______ enough room for one in the house.
| A．aren’t | B．are | C．isn’t | D．is |
--Could you please _____ in the room?
--Oh, I’m sorry.
| A．not smoking | B．not smoke | C．not to smoke | D．don’t smoke |
_____ have you been swimming? For five years.
| A．How many times | B．How long | C．How often | D．How much |
It’s really cold today, ______ ?
| A．does it | B．doesn’t it | C．isn’t it | D．is it |
---He’s never been to an aquarium.
---_______.
| A．Neither have I | B．Neither do I | C．I never too | D．I don’t too |