Question

----- Do you know when Tonny came back last night?
----- Yes. It was not yet nine o’clock _____ he came back home.

A．before

B．when

C．that

D．until

Answer 1

B

考查固定句型。句意：当他回家的时候，还没有到9点。A项必须和一段时间连用。选择B项，在nine o’clock前面加at; D项的意思与句子不符。