1. While play is important at all levels of human development， _________ takes on particular significance when children are five and six years old.
A. it
B. and
C. which
D. because it
答案：A
分析：缺主語。it 在這裡作為形式主語。
參考譯文：比賽對各個層次人的發展都是重要的，尤其是當小孩5、6歲大的時候，意義重大。
2. During the second and third years of life， children gain _________ over their bodies.
A. control increasing
B. increasing to control
C. control is increasing
D. increasing control
答案：D
分析：缺賓語，而且應該是 adj.修飾名詞，只能選D.
參考譯文：在生長的第二第三年，小孩們對自己的身體控制能力增強了。
3. All brass instruments use a mouthpiece _________ into a long cone-shaped tube.
A. is inserted
B. that inserted
C. that is inserted
D. and inserted
答案：C
分析：that引導一個定語從句，mouthpiece為先行詞。A 出現兩個謂語動詞，錯;B，D應該用被動; 參考譯文：所有的銅管樂器都用一個放在長錐筒形管裡的'吹嘴。
4. By the mid-twentieth century， United States presidential staffs， _________ had numbered fewer than ten a century earlier， numbered in the hundreds.
A. as
B. that they
C. which
D. and
答案：C
分析：非限制性定語從句，只有which能引導非限制性定語從句
參考譯文：到20時間中期，美國的總統部官員達到了幾百個，而在一個世紀前，還屈指可數呢。
5. In 1966 only 60 percent of all five year olds in the United States attended kindergarten， _________ in 1985 almost 82 percent did so.
A. with
B. which
C. whether
D. while
答案：D
分析：整個句子中出現了兩個謂語，缺連線詞。
參考譯文：在1966年，所有5歲的小孩中只有60%的參加了幼兒園，而到1985，幾乎有82%的小孩上幼兒園了。
