Question

请帮忙解决以下英语问题，并说明理由

1. This room is ___ that one.
A. three times as larger as B. three times the size of
C. three times large D. three time as large as
2. The lost of machine was reduced by ____.
A. 20 percent B. 20th percent
C. percent 20 D. percent th20
3. Are there enough books for ____?
A. three us B. us three
C. all us D. the three us
4. About ____ of the teachers in their school are women.
A. two-three B. two threes
C. two-thirds D. second-third
5. They arrived at the place by ____.
A. two and three B. three and two
C. twos and threes D. threes and twos

Answer 1

1B
A如果是three times larger than.Dtime缺少复数
2A
3B
4C
其实这些问题不需要解释，就是固定用法。为了你以后遇到类似问题再次糊涂
我觉得你就把这几个典型的句子，或者标准选项背一背，类似问题再出现了，就可以套用了。我就是采用这种方法的。肯定没有问题。
5C by....两三个一次, 三三两两

Answer 2

1B 数字+time（s）+as+形容词原级+as，所以A错
2A 20%
3B us 和three做同位语，也可以说three of us
4C 2/3的固定说法，不过好像应该没有中间的“-”
5C固定词组,意思是“三三两两”

Answer 3

1B 数词+time（s）+as+形容词原级+as，
2A 20% 这是百分数的表达法.
3B 这里three做us 的同位语，
4C 2/3的固定说法，中间的“-”可有可无.
5C固定词组,意思是“三三两两”