题目内容
词形转换
difference ________
用所给单词的正确形式填空
Who ______ (teach) Zhang Wei about the sun?
The ground got ________ (close) and ________ (close).
steady ________
concern ________
用所给词的正确形式填空
The water gets ________ (pollute) because there are more and more factories.
词形转换专练
The Earth gets more ________ (pollute).
用所给词的正确形式填空．
Students ________ (crowded) around their teachers to ask questions.
用所给词的适当形式填空
Mike told his friends the stream was ________ (call) the Golden Stream.
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