She will tell us that each of us has a role ______ in making the earth a better place to live．
| A．to have played | B．to play | C．to be played | D．to be playing |
Sally is the girl _____ I think is likely to win the first prize in the competition.
| A．which | B．who | C．whom | D．what |
You’d better______, or you may be cheated by your so-called net friends.
| A．go over | B．go out |
| C．watch over | D．watch out |
It was in Beijing _______Chinese President Xi JinPing held a 4-hour meeting with U.S. Vice President Joe Biden on December 5, 2013.
| A．where | B．which | C．that | D．when |
There is growing _____ among the public about the safety of school buses after many accidents.
| A．experience | B．chance |
| C．concern | D．purpose |
It is believed that this book is _______ worth reading than that one.
| A．more | B．better | C．quite | D．most |