1. Chromosomes are regarded today as the major carriers of genetic material， _________ of DNA and various types of protein.
A. consisting
B. as to consist
C. consist
D. which consisting
答案：A
分析：分詞作狀語。如果用consist的話，應該用個conj.後面加個完整的句子。
參考譯文：染色體現今被認爲是主要的遺傳物質攜帶者，這些遺傳物質由DNA和各種各樣的`蛋白質組成。
2. The leopard seal is the only pinniped _________ preys on penguins and other seals.
A. that normally
B. of which it normally
C. normally
D. that it normally
答案：A
分析：句中出現is和preys兩個謂語動詞，一定是個複合句;用that引導定語從句，pinniped爲先行詞，that後爲不完整句。
參考譯文：美洲虎海豹是僅有的捕食企鵝和其他海豹的鰭足類動物。
3 _________ “nova” means new， novas are actually stars that have existed for a long time and suddenly flare into brilliance.
A. That
B. Why
C. Although
D. It is
答案：C
分析：空格後有2個完整句，空格處需要一個conj.
參考譯文：儘管nova意味着新的，但其實新星們是存在了很久而突然閃耀出光輝的恆星。
4. Because Mars is farther from the Sun than _________， Mars takes longer to complete a revolution.
A. Earth is
B. is from Earth
C. what is Earth
D. is it Earth
答案：A
分析：比較結構的對稱性：Mars is farther …… than Earth is，is後省略了from the Sun
參考譯文：因爲火星比地球離太陽要遠，火星繞太陽轉一圈的時間要比地球長。
5. A social system is _________ of social relations that draws the behavior of its members toward the core values of the group.
A. a complex network
B. how a complex network
C. a complex network and
D. a network that is complex
答案：A
分析：缺賓語。B中的從句只有主語，句子不完整，錯;C中and作爲連詞，後面缺謂語，錯;D錯，因爲of前應該爲名詞。
