29. A big earthquake hit Yushu Qinghai province in the early morning and if a little lat

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

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