问题
The professor walked onto the platform and seated himself in a chair, ____ for answering questions
A:had prepared
B:being prepared
C:preparing
D:prepared
B:being prepared
C:preparing
D:prepared
正确答案是：
同类题型
ught you wouldn’t mind” “Well, as amatter of fact I don’t, but you _____ me first”
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With the development of science, more new technologytothe field of IT.