问题补充:
29. A big earthquake hit Yushu, Qinghai province in the early morning, and if a little later, many more people .
A. could survive
B. might have survived
C. must have survived
D. should survive
答案:
A. could survive
(答案→)B. might have survived
C. must have survived
D. should survive
解析:可联系答.案.网客服索取。