Question

英语单选题~

The first three of the five chapters in the book __very easy,but the rest___difficult.
A. is, are B.are,is C. was,were D.were,was
答案是A， 求解答

some people consider __ cruel to use animals for experiment
A.that it B.it C.it be D.it being
答案是B，选D错在哪儿？

The explosion on the sun cannot be heard,there ___ no air between the earth's atmosphere and the sun.
A.having B.is C.are D.being
答案是D 求详细解答

Answer 1

The first three of the five chapters in the book __very easy,but the rest___difficult.
A. is, are B.are,is C. was,were D.were,was
答案是A， 求解答

The first three 看成一个整体做主语, 前三段,

the rest ,the +形容词,自然是复数的,其余的那些.

some people consider __ cruel to use animals for experiment
A.that it B.it C.it be D.it being
答案是B，选D错在哪儿？

B.it
some people consider (to use animals for experiment) cruel
some people consider it cruel
前面括号内是实际的宾语, IT 是形式宾语.

cruel是补语, 补充说明这种形为的性质,是"残忍的"
being cruel 有进行时的意思, 正在进行残忍的形为,

句中并没有正在进行的动作,因为( use animals for experiment)可能发生在过去.

只是现在的人们认为这么做残忍.

The explosion on the sun cannot be heard,there ___ no air between the earth's atmosphere and the sun.
A.having B.is C.are D.being
答案是D 求详细解答

D.being

The explosion on the sun cannot be heard 这是一句简单句.

如果写成如下,就是复合句:

because there is no air between the earth's atmosphere ,the explosion on the sun cannot be heard
because 引导原因状语从句.

如果如题中用简单句,那么,because there is no air between the earth's atmosphere 这一句,就要改成分词结构.

即: there being no air between the earth's atmosphere ,

题中放在后面了.通常都放在前面,更好认一些.

Answer 2

前三章作为整体，用is，剩下的两章指没一章都难，用are
B consider在这里和find用法一样，+it+adj+to do
there being 是带了逻辑主语的存在句，表示原因。