补充题——140

蓝色的小猫

140. It may be another fifteen years before spacecraft from Earth again venture to Mars, a planet now known to be cold, dry, and probably lifeless.B

(A) again venture to Mars, a planet now known to be

(B) venture to Mars again, a planet now known for being

(C) will venture to Mars again, a planet now known as being

(D) venture again to Mars, a planet that is known now to be（A）

(E) will again venture to Mars, a planet known now as being

我选了B。。答案是A。

哪位NN讲一讲，be known to be,be known as, be known for being 之间的区别

autumnjin

sth1/sb be known as sth2/sb

例如：Many people knew him as a local businessman. = He was known as a local businessman by many people.

sth1/sb be known to do sth2

例如：Smoking is known to increase a person's risk of developing lung cancer.

sth1/sb be known to be sth2/sb

例如：本句A

be known for表达的是对物体或人物特性的辨识

例如：I knew him for a liar.我看得出他是个骗子。= He was known for a liar by me. －不过，需要指出的是，这种结构在语法的正确答案中好像从没出现过，我们一般只强调know as / know to do这两种结构。

nikema

补充一点

know for sth. 没有know for doing sth.

XIAOHANMEIME

Is venture noun or verb in this sentence? if  venture is verb, does it agree with sigle subject "spacecraft"?