Question

【題目】---The zookeeper was really annoyed with me.

--- How could he have been if you _______ stones at the animals?

A．didn’t throw

B．don’t throw

C．hadn’t thrown

D．haven’t thrown

Answer 1

【答案】C

【解析】此題考虛擬語氣。第一句動(dòng)物管理員生氣是在過去，所以用石頭扔動(dòng)物必然也是在過去，且在從句中，故應(yīng)該用had done,此題答案為C。