求几道英语选择题能做几道就做几道,谢谢了~~~1.I think we've__this subject;let's g

1.I think we've__this subject;let's go on to the next.
A.faded B.narrowed down C.exhausted D.distracted
为什么选C不选B?
narrow down是“缩小范围”,说明还有讨论的余地,如果还有讨论的余地,那么“为什么要讨论下一个”呢?
2.They filled__with diesel at the petrol station on their way home.
a.in b.out c.on d.up
为什么选d?
fill up with 为固定搭配.
3.I give you this advice for your own (sake).(sake 用什么替换）
a.benefaction b.purpose c.reason d.personal benefit
为什么选d不选a
benefaction ：n.善行,恩惠,施舍并不是“benefit”,for one's own sake：为了自己的利益=personal benefit:个人利益.
4.The small boat was (turnde over) by the enormous waves.
a.overwhelmed b.surged over c.poured down d.flowing over
为什么选a不选b?
turn over:掀翻,surge over ：涌向,不至于把船掀翻,程度不同,overwhelm:淹没,压倒.
5.In some tropical regions small boats used to be made of skins__over a wooden frame.
a.stretching b.being stretched c.stretchde d.at stretch
为什么选c不选a
skins是“被剥下来的”,是一种被动关系,used to 表示过去曾经,应用非谓语动词的过去式作定语.
6.Everyone seems to share in an intricate set of knowledge from the past and present whose deliciousness somehow would be ruined if Britain were a truly__society.
a.sensitive b.emotional c.fluid d.virtual
为什么选c不选d
这是一个虚拟语气的句子:
If Britain were a truly__society,everyone seems to share in an intricate set of knowledge from the past and present whose deliciousness somehow would be ruined.
看到“would be ruined ”那么前面绝不可能是一个褒义词,如果是一个高尚的城市,那么没有什么会“被毁掉 ”,所以条件里应该是一个贬义词,只有C带有贬义的味道.
7.An inernal sense of righteousness dwindles into an__concern for reputation.
a.outer b.outward c.inner d.external
为什么选d不选c
因为前面有“internal”内部的,又说是dwindle:v.减少,缩小,此处引申为“退化”,所以可以判断出这里要用"internal"的反义词,也就是external.
8.More than a dozen variable factors could__,with their permutations running into the thousands.
a.react b.interact c.set apart d.restore
为什么选b不选d
interact指“相互作用”,restore:v.回复,恢复,归还,因素“恢复或归还”有什么意义吗?因素间只有相互作用才能引起事物的变化.

好难啊，这是几级的题啊。
我大概做了下，字太多了，懒得打了。
如果你还在线，HI上讨论下吧。