1.It is necessary（a.you b.to c.harder d.for e.study）2.It is（a.from b.talk to c.people d.to e.interesting）other countries.

The indoor swimming pool seems to be a great deal more luxurious than ( )A is necessary ;B being necessary ;C to be necessary ;D it is necessary It is necessary ( ) travellers to take a map when Why is it necessary to encourage a low carbon lifestyle? Love a person,it is necessary to make love . It is necessary for people to make a call Never give him more money than___?A.being necessary B.is necessary C.it is necessary D.what necessD.what necessary government is a necessary We consider _________the instrument be adjusted each time it is used.选项:a、that it necessaryb、it necessary thatc、 necessary thatd、necessary of it that it is necessary for me to take a taxi中用动词来代替it is necessary for 用must或have to来代替括号里的词组1.（It will be necessary for you to)see a doctor.2.(Is it necessary for you to)make so much noise?3.She said (it would be necessary for us to)stay here.4.(It is necessary for me to)have some help.5.(It was the patient suffering from a cough soon found it necessary to give up smoking为什么不用it is necessary 17. We consider the machine should be adjusted each time it is used.A. that it necessary B. necessary it that C. it that necessary D. it necessary that解析下! if it is necessary /if necessary /when it is necessary 意思一样吗 请英语高手帮助几题大学英语.1.We consider ________ the instrument be adjusted each time it is used.A.that it necessary B.necessary that C.it necessary D.that necessary 2.It was in China ________ Dr.Bethune gave his life to the cause of th when it is necessary 为什么可以变为when necessary? it is not necessary a bad thing.麻烦解释一下句子的结构 ,为什么是用necessary而不是necessarily? Love a person in the end it is necessary to adhere to it?翻译 英语翻译Maybe it is a little difficult,but it's really necessary.求翻译~