Scientists have trained their telescopes on Arp.229, a pair of merging galaxies, and saw stars exploding in numebers far greater than expected.
A and saw stars exploding in numebers far greater than expected.
B and saw stars exploding in numebers far greater than they were expecting.
C and saw stars exploding in far greater numebers than expected.
D and seen stars exploding in far greater numebers than being expected.
E and have seen stars exploding in far greater numebers than expected.
我选择E 不知道对不对 有人知道正确答案么 求解释
-- by 会员 wangxiwei (2010/8/21 9:04:28)