题目内容
Some green beans, ______ long enough, can be poisonous (有毒的).
| A．if not be cooked | B．if not cooked | C．if not cooking | D．if not being cooked |
B
解析试题分析：句意：一些绿豆如果煮的时间不够久.可能会有毒。这里是表条件,而且是被动语态,相当于：Some green beans,if they are not cooked long enough, can be poisonous (有毒的). 当主从句的主语一致的时候，可以省略从句的主语和be动词，所以是B。
考点：考查状语从句的省略
每课必练系列答案
巧学巧练系列答案Doctors have been researching effect stand-up and other forms of comedy have on us.
| A．which | B．what | C．whatever | D．whichever |
To his disappointment, not a single gift _____ on his birthday.
| A．he received | B．had he received | C．did he receive | D．received he |
_______ one of you breaks the windows will have to pay for it.
| A．Whichever | B．Whatever | C．Whoever | D．Wherever |
I can well remember that there was a time _____ a deep blue sky, the song of the birds, moonlight and flowers could never have kept me spellbound.
| A．which | B．where | C．when | D．that |
After ten hours’ drive, we came to ______ is called a green house, through the glass wall of _____, we saw lots of green plants.
| A．where, which | B．that, that | C．what, which | D．where, that |
What made the archeologist feel excited was that he finally found two ancient vases in ______ seemed to him to be a king’s bedroom.
| A．that | B．what | C．where | D．which |
If unsolved, the problem of food safety may lead to more serious results.
| A．having left | B．to leave | C．left | D．leaving |
________it is to throw snowballs at each other on the playground after snow!
| A．How fun | B．What fun | C．What a fun | D．How funny |