2. 外语
  3. Unless ______ by credit card, please pay in cash.

Unless ______ by credit card, please pay in cash.

admin2010-05-25  44
问题 Unless ______ by credit card, please pay in cash.
选项 A、pay
B、is paid
C、paying
D、paid
答案C
解析 考查状语从句的省略。在unless引导的状语从句中，省略是常见的现象。本题中主句是省略了主语 you的祈使句，因此unless从句的完整结构应为unless you pay by credit card，动词psy与主语是逻辑主谓关系，故省略主语后动词应为现在分词结构。又如：Unless(it is) changed，this bill is likely to be rejected． (除非经过修正，否则这项法案很可能被否决。)
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