1. On no account ____ ever leave the baby at home alone.

　　A.should you B.you should C.shall you D.you shall

　　2. I understand ______ preparation that staff must put in under pressure to meet the deadline.

　　A. more than the enormous amount of

　　B. better than most the enormous number of

　　C. better than most the enormous amount of 

　　D. fewer than the number of

　　3. I’m sure your suggestion will ______ the problem.

　　A. contribute to solving B. be contributed to solve C. contribute to solve D. be contributed to solving

　　4. In 1840, both Lucretian Mott and Elizabeth Cady Stanton resented ______ proper seating at the World’s Antislavery convention in London because of their sex.

　　A. refusing B. to be refused 

　　C. being refused D. having refused

　　5. Nowhere in nature is aluminum found free, owing to its always ____ with other elements, most commonly with oxygen.

　　A. being combined B. having combined 

　　C. to combine D. combined

　　答案与解析：

　　1. A

　　你决不应该把小孩一个人放在家里。on no account 意为“决不”属否定意义的词，引导倒装句，所以只有A)项正确。

　　2.C

　　我比多数人更能理解员工们在最后期限的压力下所做的大量准备工作。understand better than...意为“对…非常理解”。preparation是不可数名词，须用amount修饰，故选C)。

　　3.A

　　我相信你的建议将有助于问题的解决。contribute to意为“有助于，促成”，to是介词，所以后面应接名词或动名词，故选A)。

　　4.C

　　1840年，露克里蒂安·莫特和伊丽莎白·凯蒂·斯坦顿因为他们的性别而没有得到伦敦世界废奴大会的席位，他们对此表示愤慨。resent后接名词或动名词作宾语，根据句意的要求，应使用动名词的被动语态形式，故选C)。

　　5. A

　　由于铝总是和其它元素结合在一起，最常见的是和氧气在一起，所以自然界中哪里也不会找到单独的铝元素。owing to 是介词，后应接名词或动名词，根据题意，应接被动

　　语态形式。