问题
选择题
When you got lost in the forest, I guess, you_____very frightened.[ ]
A. must be
B. must have been
C. should be
D. should have been
答案
答案：B
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When you got lost in the forest, I guess, you_____very frightened.[ ]
A. must be
B. must have been
C. should be
D. should have been
答案：B