1 Our exercises are corrected at home by the teacher

2 My car is going to be serviced tomorrow because it was damaged by yesterday's storm

3 Several new schools are being built in our town

4 Great progress has been made in industry, science and medicine

5 A lion was killed last week

6 Your report must be handed before the end of this month

7 The job had just been finished when the factory closed

8 That box has not been opened for past hundred years

9 Are these letters going to be mailed soon?

10 The report should have been finished yesterday

11 Researches on SIDA has been carried out for 2 years

5 Tea can't be made with cold water

6 All the workers of the plan are being instructed

7 Some of my books have been taken away

8 The meeting will be held before the May Day

9 The engine of the car has to be repaired

10 The window is broken and some pictures are taken away