题目内容

Rewrite the following sentences, omitting the unnecessary words or phrases.1. In my opinion, I think it is worthwhile to go about it.

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As a rule, he usually helps his little sister with her lessons.

The students were asked to assemble together at the school gate at nine o'clock.

She reversed back her car into the parking lot.

太阳的散射光大部分都是（）。

A. 线偏振光
B. 圆偏振光
C. 椭圆偏振光
D. 部分偏振光