2009.12 英语四级考试完型备考练习04
请考生注意时间，本份试卷考试时间是：0分钟，请把握好自己的考试时间，以便应对真正的考场。
请先登录才能考试！ 考生登录
综合题，请根据题目给出的内容，来回答下面给出的试题。
Cloze Test 3
Sleep is divided into periods of so-called REM sleep, characterized by rapid eye movements and dreaming, and longer periods of non-REM sleep._41_ kind of sleep is at all well-understood, but SEM sleep is _42_ to serve some restorative function of the brain. The purpose of non-REM sleep is even more _43_ . The new experiments, such as these _44_ for the first time at a recent meeting of the Society for Sleep Research in Minneapolis, suggest fascinating explanations _45_ of non-REM sleep.
For example, it has long been known that total sleep _46_ is 100 percent fatal to rats, yet, _47_ examination of the dead bodies, the animals look completely normal. A research has now _48_ the mystery of why the animals die. The rats _49_ bacterial infections of the blood, _50_ their immune systems-the self-protecting mechanism against diseases-had crashed.
Sleep is divided into periods of so-called REM sleep, characterized by rapid eye movements and dreaming, and longer periods of non-REM sleep._41_ kind of sleep is at all well-understood, but SEM sleep is _42_ to serve some restorative function of the brain. The purpose of non-REM sleep is even more _43_ . The new experiments, such as these _44_ for the first time at a recent meeting of the Society for Sleep Research in Minneapolis, suggest fascinating explanations _45_ of non-REM sleep.
For example, it has long been known that total sleep _46_ is 100 percent fatal to rats, yet, _47_ examination of the dead bodies, the animals look completely normal. A research has now _48_ the mystery of why the animals die. The rats _49_ bacterial infections of the blood, _50_ their immune systems-the self-protecting mechanism against diseases-had crashed.
请根据上面给出的内容，来回答下面的单项选择题（下列每小题备选答案中，只有一个符合题意的正确答案。每小题0分，共11题。）
1.
A ：admitted
B ：believed
C ：claimed
D ：predicted
B ：believed
C ：claimed
D ：predicted
请选择答案：请先登录才能答题
2.
A ：plain
B ：average
C ：mean
D ：normal
B ：average
C ：mean
D ：normal
请选择答案：请先登录才能答题
3.
A ：momentary
B ：prompt
C ：instant
D ：immediate
B ：prompt
C ：instant
D ：immediate
请选择答案：请先登录才能答题
4.
A ：bulk
B ：host
C ：gross
D ：magnitude
B ：host
C ：gross
D ：magnitude
请选择答案：请先登录才能答题
5.
A ：On
B ：With
C ：For
D ：By
B ：With
C ：For
D ：By
请选择答案：请先登录才能答题
5.
A ：On
B ：With
C ：For
D ：By
B ：With
C ：For
D ：By
请选择答案：请先登录才能答题
6.
A ：broadly
B ：thoroughly
C ：generally
D ：completely
B ：thoroughly
C ：generally
D ：completely
请选择答案：请先登录才能答题
7.
A ：however
B ：meanwhile
C ：therefore
D ：moreover
B ：meanwhile
C ：therefore
D ：moreover
请选择答案：请先登录才能答题
8.
A ：at
B ：in
C ：about
D ：for
B ：in
C ：about
D ：for
请选择答案：请先登录才能答题
9.
A ：manifested
B ：approved
C ：shown
D ：speculated
B ：approved
C ：shown
D ：speculated
请选择答案：请先登录才能答题
10.
A ：noted
B ：impressed
C ：labeled
D ：marked
B ：impressed
C ：labeled
D ：marked
请选择答案：请先登录才能答题