Scientists ______ thousands of chemicals before they decided on the right one in the end.
| A．tried out |
| B．found out |
| C．worked out |
| D．turned out |
We want to buy the same computers are being used in your office．
| A．which | B．as | C．that they | D．as they |
—What's your of Frank as a boss?
—Honest．
| A．impression | B．influence | C．respect | D．attitude |
—Who will become the team member of the City Cup Final，Lionard or Jack?
—Oh，．
| A．each | B．no one | C．none of them | D．possibly both |
Last month I traveled across desert by camel，achieving amazing
experience that I will never forget．
| A．a；the | B．the；an | C．the；／ | D．a；／ |
Only when in the afternoonable to leave.
| A．the match was over; they were | B．was the match over; were they |
| C．was the match over; they were | D．the match was over; were they |