There is _______ “u” and _______ “f” in the word “unfamiliar”.
| A．an, an | B．a, a | C．an, a | D．a, an |
--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 |
Would you mind ______ those old jeans?
| A．don’t wear | B．not to wear |
| C．aren’t wearing | D．not wearing |