1. 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

　　2. Physics is the presentday equivalent of ____ used to be called natural philosophy, from ____ most of presentday science arose.

　　A. which, what B. that, which 

　　C. what, which D. what, that

　　3. Evidence came up ______ specific sounds are recognized by babies as young as six months old.

　　A. what B. that C. which D. whose

　　4. ____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

　　5. 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

　　答案与解析：

　　1.B)

　　作为一个国家来说，美国将不再具有开拓西部前所具有的那种冒险精神。从意义来看，空格应填had,但主句中have是实义动词，为避免重复，可用助动词do替代，即用did替代had,故B)为答案。

　　2. C)

　　当今的物理就是以前被称之为自然哲学的等同物，大多数现代科学都产生于自然哲学。what used to be called作定语，修饰natural philosophy,from which引导一个非限制性定语从句。

　　3.B)

　　有证据表明，小至六个月的婴儿就能识别具体的声音。evidence后面的同位语从句被全句的谓语动词came up隔开，同位语从句须由that引导，所以B)项正确。

　　4. B)

　　太阳系的中心是太阳而不是地球这一事实被中世纪的教会认为是异端邪说。That引导主语从句，全句的谓语是was considered.

　　5. D)

　　后来证明他的财产被国家没收的原因是，战争期间他参与了诈骗活动。it turned out (to be)这里作插入语，意为“证明是…”。