单选题
____the center of our planetary system was considered as heresy by the church in the Middle Ages.
题目答案
B
您的答案
答案解析
【句意】太阳系的中心是太阳而不是地球这一事实被中世纪的教会认为是异端邪说。
【难点】That引导主语从句，全句的谓语是wasconsidered.
举一反三
On no account ____ ever leave the baby at home alone.
题目答案
A
您的答案
答案解析
【句意】你决不应该把小孩一个人放在家里。
【难点】onnoaccount意为“决不”属否定意义的词，引导倒装句，所以只有A)项正确。
Physics is the present day equivalent of ____ used to be called natural philosophy, from ____ most of present day science arose.
题目答案
C
您的答案
答案解析
【句意】当今的物理就是以前被称之为自然哲学的等同物，大多数现代科学都产生于自然哲学。
【难点】whatusedtobecalled作定语，修饰naturalphilosophy,fromwhich引导一个非限制性定语从句。
Nowhere in nature is aluminum found free, owing to its always ____ with other elements, most commonly with oxygen.
题目答案
A
您的答案
答案解析
【句意】由于铝总是和其它元素结合在一起，最常见的是和氧气在一起，所以自然界中哪里也不会找到单独的铝元素。
【难点】owingto是介词，后应接名词或动名词，根据题意，应接被动语态形式。
All their __ have been shown up by their own deeds.
题目答案
D
您的答案
答案解析
暂无解析
His companions have threatened to__ his crimes to the police.
题目答案
D
您的答案
答案解析
暂无解析
The local government leaders are making every effort to __ the problem of poverty.
题目答案
B
您的答案
答案解析
暂无解析
Many artists predict that this brilliant young actor __ to be a shinning star.
题目答案
C
您的答案
答案解析
暂无解析
All of us know, color-blind people often find it difficult to __ between blue and green.
题目答案
B
您的答案
答案解析
暂无解析
We expect Mr. White will ____Class One when Miss Jane retires.
题目答案
A
您的答案
答案解析
【句意】我们希望珍妮小姐退休后，怀特先生能够接管一班。
【难点】takeover意为“接收，接管”;takeup意为“开始采用;采取，承担”;takeoff意为“脱去;拿掉”;taketo意为“开始从事;开始沉湎于”。
You must pay import ____on certain goods brought into this country.
题目答案
D
您的答案
答案解析
【句意】带入本国的某些商品要交进口税。
【难点】duties意为“税，关税”;bill意为“帐单”;fee意为“费”。