20.-----for a long time,but he tried his best to catch up wi
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20.-----for a long time,but he tried his best to catch up with his classmates.
A.Having been ill B.Being ill C.Tough he was ill D.He was ill
A.Having been ill B.Being ill C.Tough he was ill D.He was ill
D
but是连词,其前后两部分要对等.此例中but后面是一个分句,那么前面也应当是一个分句.如选A就不是分句了,就只是一个现在分词短语了,因为它没有主语,也没有谓语动词.现在分词是“非谓语动词.
同理,B也不能选.
but不与though连用,排除C.
but是连词,其前后两部分要对等.此例中but后面是一个分句,那么前面也应当是一个分句.如选A就不是分句了,就只是一个现在分词短语了,因为它没有主语,也没有谓语动词.现在分词是“非谓语动词.
同理,B也不能选.
but不与though连用,排除C.
20.-----for a long time,but he tried his best to catch up wi
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he is a little weak in this but he tried his best to catch u
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翻译he tried to catch the bus but was a little too late.
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