be necessary
be necessary
be not necessary=
be necessary for和 be necessary to的区别
be necessary for和be necessary to 有何区别
be necessary for的用法
"To be taken when necessary.
it's not necessary to be the same
翻译:It's not necessary to be the same.
A major military effort would be necessary怎么翻译
be necessary for sb./sth的反义词说是什么?
改错To be well-informed ,reading widely is necessary .
1.Sometimes it is necessary to be careful_____the right date