Change these sentences into Passive voice

Ex1 : Change these sentences into Passive voice 
1.They have met their friends at the railway station .
2.They didn't allow Tom to take these books home .
3. this well - known libraty attracts many people .
4.All students attended the meeting .
5.Mary has operated Tom since 10 o'clock 
6.This is the second time they have written to as abuot this 
7.Mr.Smith has taught us French for 2 years 
8.They didn't look after the children properly
9.Nobody swept this stresst last week 
10. People drink a great deal of tea in England