1.It is important for us to learn English well.
2.It's time for lunch/class.
3.It's time for me to clean the blackboard.
4.The room is not very big.It is twelve meters long,five metres wide and three metres high.
5.It takes me half an hour to go to school by bike.
6.Why don't you keep me waiting so long.
7.We should keep our classroom clean and tidy.
8.I am looking forward to hearing from you.
9.My mother alwals makes/let me wash my clothes.
10.Neither Kate nor Mike will go to the meeting tomorrow.
I can neither dance nor sing.
11.I don't like meat at all.
12.Miss Li is not only our English teacher but also our best friend.
13.I don't go to bed until ten o'clock every day.
14.I have two brothers.One is a doctor and the other is a policeman.
15.The students are cleaning the classroom.Some are sweeping the floor.Others are cleaning the windows.