题目

高中英语单项问题
1.If sarkozy"s policy goes through.France will raise the retirement age( )two years to 62 by 2018
1. from 2.in 3. by 4.between

2.A beam of light will not bend round the corners unless( ) to do so with the help of a reflecting device
1.being done 2. to be made 3. made 4.having made

提问时间：2021-03-24

答案

1.by,增长多少都可以用by,增加到多少就用to
2.made 这里可以理解成前面省略了it is,意思是,除非用反射设备迫使光改道,要不然它是不会拐弯的.