when it is necessary 为什么可以变为when necessary?
when it is necessary 为什么可以变为when necessary?
if it is necessary /if necessary /when it is necessary 意思一样吗
Professional people appreciate __ when it is necessary to ca
英语翻译When it is necessary to communicate with the specificati
英语翻译When your design is done,it is usually necessary to pres
It is necessary for to do first aid when we _____ someone in
英语作文:It is necessary for freshmen to have a laptop when they
It is necessary ( ) others when they are in trouble.Do you t
Is it necessary to make mistakes,even when doing so has nega
英语翻译it is necessary for us to do first aid when we ___1____
it is necessary .
"To be taken when necessary.