41. 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 itA
分析:缺主语。it 在这里作为形式主语。
参考译文:比赛对各个层次人的发展都是重要的,尤其是当小孩5、6岁大的时候,意义重大。
42. 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 controlD
分析:缺宾语,而且应该是 adj.修饰名词,只能选D.
参考译文:在生长的第二第三年,小孩们对自己的身体控制能力增强了。
43. All brass instruments use a mouthpiece _________ into a long cone-shaped tube.
A. is inserted
B. that inserted
C. that is inserted
D. and insertedC
分析:that引导一个定语从句,mouthpiece为先行词。A 出现两个谓语动词,错;B,D应该用被动;
参考译文:所有的铜管乐器都用一个放在长锥筒形管里的吹嘴。
45. 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. andC
分析:非限制性定语从句,只有which能引导非限制性定语从句
参考译文:到20时间中期,美国的总统部官员达到了几百个,而在一个世纪前,还屈指可数呢。
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