用PowerPoint制作演示文稿时，如果要插入图片，下列不能完成该项操作的是( )。

Because of the strong sun, the new drawing-room curtains have（ ）from dark blue to

grey.

What does he/she intend to do when a teacher writes the following sentences“She gets up

early.She wears a uniform.She works very hard.”on the blackboard at the presentation stage?

We don't know what experiment those researchers would（ ）on females to test this

hypothesis

在现代英语教学中出现越来越多新的教学模式，中学英语教师在课堂上的系统呈现解逐渐被丰富多彩的课堂活动所取代。

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