詞匯學習9：
1．Although originally a German innovation，kindergarten got its real start in the United States as a movement to provide an improved learning environment for children．
A an easy B a playful C an open D a better
2．There is always excitement at the Olympic Games when an athlete breaks a previous record of performance．
A beats B matches C maintains D announces
3．The attack on Fort Sumter near Charleston provoked a sharp response from the North，which led to the American Civil War．
A demanded B elicited C extracted D defied
4 Illinois has produced writers such as Carl Sandburg，gangsters such as A1 Capone，and architects such as Louis Sullivan．
A violent criminals B politicians
C musicians D industrialists
5．The towers of a suspension bridge serve as a rigid framework to which the cables are attached．
A boundary B skeleton C enclosure D material
6．The use of the chemical may present a certain hazard to the laboratory workers．
A protection B indication C immunity D danger
7．Many economists have given in to the fatal 1ure of mathematics．
A error B function C attraction D miracle
8．The development of the transistor and integrated circuits revolutionized the electronics industry by allowing components to be packaged more densely．
A compactly B inexpensively C quickly D、carefully
9．The leading astronomers of the sixteenth and seventeenth centuries were fascinated by comets．
A intrigued B infected C inconvenienced D inclined
10．In their productions，choreographers of modem dance have introduced humor，protested social injustice，and probed psychological problems．
A solved B explored C involved D disputed
11．They agreed to settle the dispute by peaceful means．
A solve B determine C untie D complete
12．The children trembled with fear when they saw the policeman．
A wept B cried C ran D shook
13．We were shocked to find that Mary didn’t know her guest’s name．
A frustrated B disturbed C relieved D surprised
14．We have got to abide by the rules．
A stick to B persist in C safeguard D apply
15．The river widens considerably as it begins to turn east．
A extends B stretches C broadens D traverses