The Greens _____using WeChat _____ QQ, because it’ s more convenient.A. prefer; to usingB. prefers; to useC. prefers; to using
The light in the room was _____, but nobody was in.
--Could you please _____ in the room? --Oh, I’m sorry.
_____ have you been swimming? For five years.
---He’s never been to an aquarium. ---_______.
Would you mind ______ those old jeans?