单项选择题

I haven’ t seen Johnson these days.
---I think she （） a conference in Beijing, but I’ m not sure.

A. should be attending
B. might be attending
C. could have attended
D. must have attended

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填空题
A. group B. about C. found D. without
单项选择题
Many experts hold the view （） protection awareness is （） the key to better environment lies.

A. that; where
B. which; in which
C. which; where
D. that; in which
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