还有三题大全题，请指教

1.        International sporting events need not be fiscal disasters, the financial success of the 1992 Olympic Games demonstrates that fact.

(A) the financial success of the 1992 Olympic Games demonstrates that fact

(B) for example, the 1992 Olympic Games were financially successful

(C) like the financial success of the 1992 Olympic Games demonstrates

(D) a fact demonstrated by the 1992 Olympic Games, which were financially successful

(E) as the financial success of the 1992 Olympic Games demonstrates

如果D改成was financially successful是不是就对了？

A.     than under it

B.      than were they under it

C.      than had been under it

D.     than were the babies

E.      than those were under it

A

3.     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

我选C，为何错？