1、The front door of the house____,so we had to enter through the back door.(D)
A.being painted B.having just been painted
C.to be painted D.was being painted
2、Her expression suggested she____reluctant. Then why did you insist that she_____the dog meat?(A)
A.was...taste B.be...taste C.be...would taste
D.was...tasted
3、The committee had been talking about the metter for hours, but it didn't___any conclusion.(A)
A.arrive at B.come C.get D.reach to
4、It is the ability to do the job____matters, not where you come from or what you are.(B)
A.one B.that C.what D.it
5、_____is known to all, who can be the next President of America depents on how much money he has.(A)
A.As B.Which C.That D.Such
6、Is this research center____you visited the modern equipment last year?(C)
A.where B.that C.the one that D.the one where

1 前门在油漆,我们只好从后门进去 这里前门是"被"刷 用被动 又是正在被刷 用进行时
2 suggeste做"建议"时 用虚拟语气 做"暗示"时则不用虚拟 前面是suggested 做"暗示"且是过去时 所以后面也用过去时was insist 做 "坚持"时用虚拟 做"坚持说"不用虚拟 这里做"坚持" 坚持让他吃狗肉 所以用虚拟 reluctant 是勉强的意思

3 固定搭配 draw/reach/arrive at /come to conclusion 得出结论　
4 这是一句强调句　It is ...that.. .　　　你从哪来你是谁没有关系，有关系的是你工作的能力　
５As　is known to all　　as 替代了which 但不能用That　这是非限制性定语从句　不能用That　
６　visit是及物动词　引导词做visit宾语　选项用了one　则要用that　　　当然　如果visit是go 的话　则用where 应为句中却地点状语