1.Look,the bird is in (danger).Don't climb up the tree.It's (dangerous).
2.When the mouse saw the cat,it (ran quickly) into the hole.
3.The buildings fell down (terribly).
4.If you work hard,you {can (can可有可无) study} English well.
5.It's eight o'clock.The Zhanggs (is planning) the trip to Nanjing tomorrow.
6.Jack didn't study hard last term at all,so he (fell) behind.
7.Tom said that he (could finish) the work in two days.
8.I think she (will be) able to swim next year.