摘要： Watching the online open courses of some famous European and American universities a new fashion among white collars in China over the past few months. A. became B. had become C. has become D. becomes
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Watching the online open courses of some famous European and American universities _______a new fashion among white collars in China over the past few months.
A. became B. had become C. has become D. becomes
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Watching the online open courses of some famous European and American universities _______a new fashion among white collars in China over the past few months.
- A.became
- B.had become
- C.has become
- D.becomes