用所给词的适当形式填空1. -The window is so dirty.-I know. It for weeks. 题目和参考答案——青夏教育精英家教网—

题目内容

用所给词的适当形式填空

1. —The window is so dirty.

—I know. It (not clean) for weeks.

课前预习

1. jiasn’t been cleaned

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