It is ______ for us students to learn English very well.(need)

it is not right for us ______(waste) water Doctors say it is good for us.=Doctors say it ______ for us.（横线上填两个词） it is good for us It is ______ for us students to learn English very well.(need) 该是我们进行课外活动的时候了.it is time for us ____ _____ _____ ______ . is it good for for us or bad for us To eat healthy food is imortant for us.(改为同义句）______ important for us ______ ______ ______ ______. It is diffcult for us stand up it is good for us study english it is difficult a book for us I think it is bad for us this question is very hard.None of us can work it out.(保持原意）this question is ______ hard for ________of us to work out It is important ______ us ______ English well.A:for, to study B:for, to studying C:to, to study D:to, studying The classroom is so dirty that we can't study in it.（保持原意）The classroom isn't ______ ______ for us to study in it. ______,is it necessary for us to form the habit of reading every day.用such还是therefore? ______,is it necessary for us to form the habit of reading every day.用so还是therefore?为什么? This jacket is made of wool.It can keep us warm.(合并成一句)This woolen jacket______ ______ for _____warm. It is inportant for us to be carefull ______ fire.A to B with C on D using