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________ your composition carefully,some spelling mistakes c

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________ your composition carefully,some spelling mistakes can be avoided.
A.Having checked
B.Check
C.If you check
D.To check 为什么选C?
这句意思很明显
如果你检查的仔细点,一些拼写错误是可以被避免的.
第一个是表示已经仔细检查过了,第二个是错的,第四个是表示一个目的,而不原因
再问: 那A的这种用法适合用在哪里?? 还有having done 和doing如果在句首用哪个
再答: 给你举个例子

Having checked his composition careflully, Jim hand it over to the teacher and leave.

Jim went to the playground, playing football.

伴随状语不被主句时态影响