1.The little girl tried to help her parents, they told her to leave the room.
答案:but
2.They decided to chase the cow away it did more damage here.
答案:before
3.Luggage may not be brought into the building the guard has checked it first.
答案:unless
4.You cannot take back your words they are out of your mouth.
答案:once/after/when
5.The aging process is not entirely determined by heredity(遗传), is influenced by different environmental and social circumstances as well.
答案:but
6.I was about to give up my effort to solve the problem a good idea struck me.
答案:when
7.Trust is needed in the whole society,which requires parents to obey their own rules and set a good example children can trust them.
答案:so that/in order that
