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 |
Among the competitors, there are three little girls , is Mary.
| A．the smallest of whom | B．the smaller of whom |
| C．the smallest of them | D．the smallest one |
The idea they have come up with sounds great, but it remainswhether it works well in practice．
| A．to see | B．to be seen | C．seeing | D．seen |
It is said that nobody in the world can lift a subject which is ______ himself.
| A．the tree times weight of | B．three times the weight of |
| C．as three times as heavy as | D．three times as heavier as |
Since I bought the book two weeks ago, I ______ hardly ______ time to open it, just because of the research paper.
| A．have; had | B．did; have | C．have; any | D．had; any |
As is widely accepted, _______ students should have ______ easy access to labs, libraries and other facilities at school.
| A．/; an | B．the; an | C．the; / | D．/; / |