大全 446 求助

feierer

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.

(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

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

答案是A, 用分词短语修饰同位语a planet. 为什么用定语从句修饰a planet的D不对?

acinderellas

D. 1. that is 省略后不影响句意，所以应该省略。

2. now 的位置错， known now to be 错， now known to be 才对呀。

lixinli

请问venture为什么不加s? Spacecraft应该是单数吧？

xiaoxiao88

spacecraft are vehicles used for flight in outer space.

______来自牛津例句

billchen_hikaru

space‧craft [countable]

TTS a vehicle that is able to travel in space

LDOC