________ with the size of the whole earth, the highest mountains do not seem high at all.
A、IfyoucompareC
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Others argue that since the earth has endured a long string of ice ages in the last two millionto three million years, any warming is ________ to be temporary.
When he suddenly ________ up the subject of genetic engineering, there was an embarrassedsilence.
I'm ______ to graduate in the next half of the year.
It is useful to science _______ the earth as an object in space.
Asyoulikepopmusic,__________Ilikeliterature.
