高中英语必修4 Unit 2 Working the land课时作业练习含答案 精品

when no “real”obstacle exists between where we are and where we want to go，we 20 see obstacles in our heads.

本文是一篇夹叙夹议文。一位海洋生物学家做了一个小实验，作者由这个实验发出感慨：我们中的许多人经历过挫折和失败后，会从情感上选择放弃，并停止尝试。

1．A.demands C．schedules

B．expectations D．requirements

解析：实验结果在你的预料(expectations)之中。demand“要求，需求”；schedule“工作计划，日程安排”；requirement“要求，必要条件”。

答案：B 2．A.changed C．inserted

B．added D．crashed

解析：然后这位生物学家把一块坚固的玻璃纤维插入(inserted)这个水箱里，制造出两个分开的部分。add“添加”，常与介词to搭配使用。

答案：C 3．A.separate C．connected

B．opposite D．relevant

解析：参见上题解析。separate“分开的”；opposite“对面的，迥然不同的”；connected“相连的”；relevant“紧密相关的”。

答案：A 4．A.delicate C．transparent

B．hidden D．flexible

解析：根据语境可知，这边的鲨鱼可以看到对面的用作诱饵的鱼，因此生物学家插入水箱的玻璃纤维是透明的(transparent)。delicate“易碎的”；hidden“隐藏的”；flexible“可弯曲的，有弹性的”。

答案：C 5．A.Yet C．Instead

B．Meanwhile D．Again

解析：根据第一段中的“attacked”可知，此处应表示再一次(Again)，鲨鱼快速对用作诱饵的鱼发起了攻击。

答案：D 6．A.bounced C．withdrew

B．paused D．leapt

解析：但是这一次，鲨鱼被弹了起来，因为它重重地撞上了玻璃纤维分隔板。bounce“(使)弹起，弹跳”，符合语境。pause“停顿”；withdraw“撤回，撤离”；leap“跳跃”。

答案：A 7．A.trapper C．tester

B．catcher D．divider

解析：参见上题解析。divider“分隔物，分开物”，符合语境。trapper“捕杀动物者”；catcher“捕捉器，接球手”；tester“测试员，测试器，试用品”。

答案：D

8．A.accomplishing C．copying

B．repeating D．strengthening

解析：根据上文中的“Determined”和下文中的“This experiment was carried out several times.Each time，the shark got less 12 and made fewer attempts to attack the fish”可知，一开始，鲨鱼不断重复(repeating)这一行为。accomplish“完成”；copy“复制，模仿”；strengthen“加强”。

答案：B 9．A.in order C．in secret

B．in vain D．in pain

解析：尽管鲨鱼不断重复这一行为，但都是白费力气。in vain“徒劳，白费力气”，符合语境。in order“井然有序，适当”；in secret“秘密地，暗中”；in pain“痛苦地”。

答案：B

10．A.unaccustomed C．unharmed

B．unchallenged D．unnoticed

解析：上文提到鲨鱼攻击用作诱饵的鱼的企图都失败了，因此，此处表示“用作诱饵的鱼毫发无伤地四处游动”。本段最后一句“the bait fish could swim wherever they wished，free from harm”也是提示。unaccustomed“不习惯的，不适应的”；unchallenged“未受到过质疑的，未受到过挑战的”；unnoticed“未被注意到的”。

答案：C 11．A.divorced C．raised

B．declined D．abandoned

解析：最终，鲨鱼放弃了(abandoned)捕猎到用作诱饵的鱼的希望。divorce“使脱离”；decline“拒绝”；raise“提高”。

答案：D

12．A.blind C．alert

B．aggressive D．arbitrary

解析：每一次，鲨鱼的攻击性都会变得更弱一点。aggressive“侵略的，挑衅的”，符合语境。blind“盲目的”；alert“警觉的”；arbitrary“任意的”。

答案：B

13．A.got occupied with C．got tired of

B．got involved in D．got used to

解析：根据下文中的“and simply stopped attacking...but the shark didn't attack”可知，鲨鱼厌倦了(got tired of)撞击玻璃纤维。get occupied with“忙于”；get involved in“卷入”；get used to“习惯于”。

答案：C 14．A.readjusted C．replaced

B．restored D．removed

解析：然后，生物学家移除了(removed)玻璃纤维，但是鲨鱼仍不攻击。readjust“再次调整”；restore“恢复”；replace“替换”。

答案：D 15．A.barrier C．gap

B．distance D．distinction

解析：鲨鱼被训练得相信它和用作诱饵的鱼之间有障碍物(barrier)，因此(玻璃纤维被移除后)小鱼无所顾忌地四处游动，不受攻击。distance“距离”；gap“间隙”；distinction“区别”。

答案：A 16．A.so C．as

B．but D．for

解析：参见上题解析。前后句之间是因果关系，前面是因，后面是果，故选并列连词so。 答案：A 17．A.readily C．emotionally

B．intentionally D．physically

解析：我们中的许多人，在经历挫折和失败后，会从情感上(emotionally)选择放弃，并停止尝试。readily“快捷地，轻而易举地”；intentionally“有意地”；physically“身体上地”。

答案：C 18．A.because C．unless

B．though D．while

解析：好比这个故事中的鲨鱼，我们认为因为我们过去失败过，所以就永远不会成功。此处应用because引导原因状语从句。

答案：A 19．A.Above all C．As a result

B．In other words D．In conclusion

解析：换句话说(In other words)，我们不断(constantly)在我们的脑中看到障碍，即使我们所在的位置和我们想要达到的位置之间并没有“真正的”障碍。above all“最重要的是”；as a result“结果”；in conclusion“总之”。

答案：B 20．A.abruptly C．eventually

B．constantly D．occasionally

解析：参见上题解析。abruptly“突然”；eventually“最终”；occasionally“偶尔”。 答案：B Ⅲ.短文改错

It is clear shown that many middle school students have physical and mental problems.68% of the students surveying have studying anxiety as well as poor eyesight too.And a larger percentage lacks sleep.52% are short of physical exercise.42% of the students won't obey our parents or teachers.Personally，I think we student should balance our physical exercise and studies.Without sound body，one can't achieve anything.However，too much attention has been paid only on studies.As a result，I suggest we are given less homework or more time for out-of-classroom activities.Only in this way can we live a happy and healthy life.

答案：

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