-How amazing it is that astronauts are exploring outer space!( ) -It’s a challen
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—How amazing it is that astronauts are exploring outer space!（ ）
—It’s a challenge, I guess, ________ man against nature.
A. of B. for C. by D. about
试题答案
A
句意：—宇航员们在探测外部空间，多么神奇呀！—我想，这是人类与大自然搏斗的主要难题之一。challenge 常与of连用，of表示“coming from”来源于。