[求助]大全677

freedownload

1.                             Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on the surface of the Sun but have never been sighted on the Sun’s poles or equator.

(A) are visible as dark spots on the surface of the Sun but have never been sighted on

(B) are visible as dark spots that never have been sighted on the surface of the Sun

(C) appear on the surface of the Sun as dark spots although never sighted at

(D) appear as dark spots on the surface of the Sun, although never having been sighted at（C）

(E) appear as dark spots on the Sun’s surface, which have never been sighted on

请帮比较一下A和C

smilezw

你翻译一下就好了, GMAT考的不全是语法正不正确, 而是逻辑和语言的严密性


答案A是说sunspot 是可看见的, 而C是在说他像个黑点一样出现的