用所给词的适当形式填空.It's too hot inside.Let's keep the windows______
用所给词的适当形式填空.It's too hot inside.Let's keep the windows________(open). You need to keep your eyes_______(close)when doing eye exercises. Boys and girls,please keep our classroom ______(clean). I'm sorry to keep you ______(work) so late. 请问keep的具体用法是什么呀?