71. Such a small man can’t _____ reach the balloon one metre higher than he.
| A．possibly | B．impossible | C．possible | D．Impossibly |
单项选择（每题1分）
—Tomorrow is Christmas!
—_____? We have no holiday anyway.
| A．What if | B．So what | C．Why | D．Really |
单项选择（每题1分）
We must think twice _____ we make the final decision.
| A．when | B．while | C．until | D．before |
单项选择（每题1分）
The stones each _____ as much as two tons.
| A．weighs | B．are weighed | C．weigh | D．is weighed |
单项选择（每题1分）
Is this the reason _____ she explained in the report for her success in the job?
| A．what | B．that | C．how | D．why |
单项选择（每题1分）
—Look, John’s fallen asleep at work!
—Oh, he must have _____ late last night.
| A．waken up | B．put up | C．taken up | D．stayed up |