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对于分子中含有共轭双键，α，β-不饱和羰基结构的化合物以及芳香化台物，推断化合物类型可采用() A.红外光谱 B.紫外光谱 C.质谱 D.核磁共振谱 E.旋光谱
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【单选题】If I _______ foreign language last year, I would have taken it.
A.
have been fond of
B.
was fond of
C.
were fond of
D.
had been fond of
【简答题】My name is Carl Kennedy and I’m an English teacher. I really like my job. I feel very glad when my students feel comfortable speaking English. But I have to admit that sometimes I feel a little enviou...
【单选题】—I wonder if our foreign teacher Mr. White _________ to his hometown next Tuesday. —I’m not sure. But if he returns to his hometown, I’ll ___________ him off.
A.
return ； see
B.
will return ； see
C.
will return ； will see
D.
returns; see
【单选题】If only I ____ several foreign languages.
A.
could speak
B.
can speak
C.
speak
D.
will speak
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