1. ________ he comes, we won’t he able to go.
a. without b. unless
c. except d. even
答:b。unless“除非,如果不”,为连词,相当于于if...not。even为副词。a和c项为介词。
2. i didn’t manage to do it ______ you had explained how.
a. until b. unless
c. when d. before
答:a。若选b项主句应是虚拟句式 i wouldn’t have managed to do it if you had not explained how.
3. i had a picture taken ________ there is a tower.
a. at which b. at where
c. the place where d. where
答:d。where引导的是地点状语从句。
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