Question

Don’t talk with your partners in class_______ you are asked to do so.
A. if         B. when         C. unless

Answer 1

C

解析試題分析：句意：如果你沒有被要求交談那么在課上不要和你的同伴交談。A. if如果B. when 當(dāng)C. unless如果不，根據(jù)句意，故選C.
考點(diǎn)：考查連詞的用法。