your compositions carefully and some spelling mistakes can be avoided.A. Having checkedB.

问题补充：

your compositions carefully and some spelling mistakes can be avoided.

A. Having checked

B. Check

C. Checked

D. To check

答案：

A. Having checked

(答案→)B. Check

C. Checked

D. To check

解析：句意：仔细检查你的作文，一些拼写错误都能避免。这里使用了固定句型“祈使句+and/or+简单句”，所以选B。