it is necessary to do sth造几个句子~
问题描述：
it is necessary to do sth
造几个句子~
答
is it necessary for me to answer this question?
答
It is necessary to take an umbrella.
It is necessary to have a good diet.
It is necessary for you to attend the meeting.
答
It is necessary to study harder.
答
It's necessary for you to answer this question.对于这个问题,你有必要回答.