單項(xiàng)選擇題

It is useful to science（）the earth as an object in space.

A.to consider
B.which considers
C.considers
D.the consideration of

你可能感興趣的試題

單項(xiàng)選擇題

We must（）that the experiment is controlled as rigidly as possible.

A.assure
B.secure
C.ensure
D.issue

單項(xiàng)選擇題

Be careful,（）you'll fall down.

A.on the contrary
B.or rather
C.or else
D.as for

感谢您访问我们的网站，您可能还对以下资源感兴趣：

中文字幕网国产

国产一级特黄a大片亚洲浮力影院久久久久久亚洲第一二三区日韩国产国产精品第不卡国产视频第一页

<fieldset id="l7t4d"></fieldset>