问题
选择题
— What do you suppose _____ her look so upset?
— _____ by her boyfriend again.
A. making; Misunderstood
B. had made; Being misunderstood
C. made; Having been misunderstood
D. has made; Misunderstood
答案
答案：C
缺失。托式黏膜支持式可摘义齿。唇、颊基托边缘伸展至黏膜转折，前牙区牙槽骨较突。引起疼痛的原因是（）。
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