She didn't answer the telephone, sheasleep.[ ]A. must fallB. must have fallenC. should have fal
A. must fallB. must have fallenC. should have fallenD. can have fallen
题目简介
She didn't answer the telephone, sheasleep.[ ]A. must fallB. must have fallenC. should have fal
题目详情
A. must fall
B. must have fallen
C. should have fallen
D. can have fallen
答案