it is necessary to ask for time to think it over

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 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 for me to take a taxi中用动词来代替it is necessary for the patient suffering from a cough soon found it necessary to give up smoking为什么不用it is necessary it is necessary for you to work Is it necessary to learn grammer It is necessary for sb to It is necessary to do 的例句 Love a person in the end it is necessary to adhere to it?翻译 To master a foreign language is necessary(用it is改句） 英语作文:It is necessary for freshmen to have a laptop when they go to university? it is not necessary to be a great scientistmake a difference3Q 关于necessary.it is necessary to do sth.it is nec关于necessary. it is necessary to do sth. it is necessary to doing sth. 两者有什么区别?什么时候用to do .什么时候用 to doing?请回答, Do you think it necessary for me to give him a letter 这句话为什么不用is不应该是it is necessary .还是有什么额外的规则? Real estate prices in china :is it difficult to own a property?Are restrictions necessary?