were there a piece of paper on the teacher's desk just now?中有何错误
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were there a piece of paper on the teacher's desk just now?中有何错误
were there a piece of paper on the teacher's desk just now?中有何错误
were there a piece of paper on the teacher's desk just now?中有何错误
看到有人答错了,说一句,应该是was there
a piece of是单数 用was
were改成where
were改为was a piece of paper 是单数