问题描述：
they were expect to be here an hour ago,but they haven't appeared so far(同意句) they were _ be he
they were expect to be here an hour ago,but they haven't appeared so far(同意句)
they were _ be here an hour ago,but they haven't appeared so far
they were expect to be here an hour ago,but they haven't appeared so far(同意句)
they were _ be here an hour ago,but they haven't appeared so far
问题解答：
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