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 Antislavery 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

　　6. America will never again have as a nation the spirit of adventure as it ______ before the West was settled.

　　A. could B. did C. would D. was

　　7. Physics is the presentday equivalent of ____ used to be called natural philosophy, from ____ most of presentday science arose.

　　A. which, what B. that, which

　　C. what, which D. what, that

　　8. Evidence came up ______ specific sounds are recognized by babies as young as six months old.

　　A. what B. that C. which D. whose

　　9. ____the center of our planetary system was considered as heresy by the church in the Middle Ages.

　　A. It is the sun and not the earth

　　B. That the sun and not the earth

　　C. Being the sun and not the earth

　　D. The sun and not the earth

　　10. The reason that his property was confiscated by the country, it ____, was that he was involved in a lot of fraudulent activities during the war.

　　A. was turned out B. was being turned out

　　C. being turned out D. turned out