The shy girl felt and uncomfortable when she could not answer her teacher's questions. A.

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A. amazed
(答案→)B. awkward
C. curious
D. amused
解析：句意：当那个害羞的女孩没能回答出老师的问题时，她感到尴尬和不舒服。amazed 惊奇的；   awkward尴尬的；curious好奇的； amused 愉快的。与unfortable 并列，意思相近的词是awkward，根据句意故选B。