这题应该选的是A“is necessary” than即可以做连词也可以做介词的than都是比较的含义，它居然也可以用在定语从句中。 例句： 1. Parents had better not give kids more money than is needed. 父母最好别给孩子们太多的钱，够用就可以了。 2. Don't order more food than can be finished. 别点太多吃的，会吃不完的。 此处Than以主语的形式出现在定语从句中，其实省略了what，than也就等于than what。例句也可以写作：Parents had better not give kids m...
1。答案：B解析：在“More...than...”中，肯定“more”后面的而否定“than”后面的，约等于“是……而不是……”如：7)The difference between pure linguistics and applied linguistics is more apparent than real.8)This b...
