问题
选择题
—Two hundred of the tourists were saved from danger in Taiwan, but the rest ______ still missing．
— If only the travel agency ________ more measures to prevent such accidents．
A．is; has taken
B．are; had taken
C．is; took
D．are; would take
答案
答案：B
第一空考查主谓一致，the rest做主语，谓语和the rest修饰的名词决定，这句话指的是tourists，用are，第二空考查虚拟语气，If only+宾语从句，从句中的谓语用相应的过去时，这句话指的是旅行社过去要采取措施就好了，用过去完成时。选B。
