求助英语：用适当的介词填空
1.What often happen ___you ___your dream?
2.Please walk quietly ___ the hallway.
3 Some of the fish escaped ___the net.
参考答案:1. to, in
happen to和in one's dream是固定表达
2. in/along/down
这三个介词都可以填在这里。“down”在这里相当于“along”
3. from
escape from (some place)也是固定表达