________ your composition carefully, some spelling mistakes can be avoided.

________ your composition carefully, some spelling mistakes can be avoided.

A.Having checked

B.Check

C.If you check

D.To check

答案及解析： C

解析：

现在分词和不定式作状语，其逻辑主语必须是句子主语，填入A或D项意思就不通了，所以应改成if引导的条件状语从句，正确答案为C.例如：If it is fine tomorrow，we will go and visit the museum．如果明天天晴，我们将去参观博物馆.