1. ______, he talks a lot about his favorite singers after class.
A. A quiet student as he may be B. Quiet student as he may be
C. Be a quiet student as he may D. Quiet as he may be a student

2. Nobody but Jane ______ the secret.
　 A. know B. knows C. have know D. is

3. She apologized for ______ to attend the meeting.
A. her being not able B. her to be not able
C. her not to be able D. her not being able

1. 本題答案是B。

此題考查as引導的一種特殊倒裝句。連詞as作“雖然”講時，引導的讓步狀語從句通常可與although起首的從句通用，但as所引導的讓步狀語從句必須倒裝，并且倒裝的方式比較復雜，其中之一是：（形容詞 +）可數名詞單數（其前不可加冠詞）+ as +主語 + be+主句。故答案為B。

2. 本題答案是B。

不定代詞somebody, someone, something, anybody, anything, everybody, everyone, everything, nobody, no one, nothing作主語，謂語動詞用單數，故答案為B。

3. 本題答案是D。
此為固定語序，sb’s not doing sth. 故答案為D。