首页 > 留学知识库

问题: 英语

You use the office phone for private calls
during working time .It's not permitted.
A needn't
B mustn't
C may not
D won't
答案是B,请解释

解答:

need't 不必,没必要
mustn't 不允许,禁止
C是可能不
D是将不会
最后一句It's not permitted是这不被允许,所以选B