Millions of people around the world suffer from a painful addiction to biting their nails，which can be harder than smoking cigarettes．
| A．to be quitted | B．to quit |
| C．to have quitted | D．to quitting |
相关试题
_____, I have never seen anyone who's as capable as John．
| A．As long as I have traveled | B．Much as I have traveled |
C．Now that I have trav eled so much |
D．As I have traveled so much |
_____ the secret of nature, the young scient
ist has little time for ent
ertainment．
| A．Devoted to bring up |
B．Devoted himself to bring up |
| C．Devoted to bringing up | D．Devoting to bring up |
— ?
—Nothing serious, but a bit tired．
| A．Anything the matter with you | B．Is that all |
| C．Anything else | D．What's this |
He was always _______ for knowledge, and at last became an expert in the field of art.
| A．fond | B．content | C．brave | D．greedy |
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