You are______your time trying to persuade him;he’ll never join us.
| A．spending | B．wasting | C．losing | D．missing |
I know nothing about the young lady _______ she is from Beijing.
| A．except | B．except for | C．except that | D．besides |
Scientists say it may be five or ten years _______ it is possible to test this medicine on human patients.
| A．after | B．before | C．since | D．when |
I send you 100 dollars today, the rest _______ in a year.
| A．follows | B．followed | C．to follow | D．being followed |
Taking a plane is the quickest _______ to get to Tibet.
| A．mode | B．manner | C．means | D．method |
Though he is a(n) _______ worker, he works very hard.
| A．ordinary | B．common | C．usual | D．general |