— We’d better go home right now. The sky is getting .— Okay, let’s go!
Nowadays________of business letters are written in English.
—Have you ever been to Shanghai? —Yes.I________there a few months ago. A.have been B.went C.have gone
—Would your younger brother go for a picnic this Sunday? —If I don’t go,________.
It’s said that________of the water around the world________polluted.
She has never been to the city,________she? A.doesn’t B.hasn’t C.has