The scientist does not study nature ________ it is useful to do so. He studies it because he takes pleasure in it.
| A．until | B．though | C．because | D．Unless |
. – How did you spend your national holidays?
– Oh, I________most of my time watching TV, and then I was invited to visit a relative in Qingdao.
| A．have spent | B．was spending | C．spent | D．had been spending |
It shocked us all________that little boy hadn’t been separated from that patient, he would have been infected with H1N1.
| A．if that | B．that if | C．if | D．that |
To tell________truth, his coming is really_________big surprise to most people present at the party.
| A．/ ; a | B．the ; / | C．the ; a | D．/ ; / |
_____ holiday, my family will go to Shanghai to visit the World Expo.
| A．To talk of | B．Talk of | C．Talking of | D．Talked o |
Everyone in our school is working hard and doing what we can _____ a good college.
| A．enter | B．to enter | C．entering | D．entered |