---your composition carefully, and some spelling mistakes ca

正确答案是：B.
考点：
【祈使句+and 】固定句式.
知识链接：
【祈使句+and /and then/or /or else/otherwise】可以转换为if条件句,或非谓语动词结构.例如：
【Check】your composition carefully,and some spelling mistakes can be avoided.
=If you check your composition carefully,some spelling mistakes can be avoided.
=Checking your composition carefully,some spelling mistakes can be avoided.
注意：后面两种替换形式中都【没有连词 and】.
祝你开心如意!