1. On no account ____ ever leave the baby athome alone.

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

　　2. I understand ______ preparation that staffmust 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. becontributed to solving

　　4. In 1840, both Lucretian Mott and Elizabeth Cady Stanton resented ______ properseating 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 otherelements, 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 theWest 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 sixmonths old.

　　A. what B. that C. which D. whose

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