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外语
______ in the air, fuels give off heat.
______ in the air, fuels give off heat.
admin
2007-10-13
18
问题
______ in the air, fuels give off heat.
选项
A、To burn
B、Burned
C、To be burned
D、Being burned
答案
B
解析
本题测试非谓语动词的用法。本句的意思是:“在空气中燃烧时,燃料散发出热量。”因为主语fuels与burn是被动关系,所以要用过去分词做状语。由于本句不是表示正在发生或将要发生,而是叙述一种一般现象,因此不用表示将来的to和表示正在进行的being结构。故B为正确答案。
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0
成人本科学位英语
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