4. the robbers made the bank manager to lie on the ground
5. he began studying english 6 years ago
6. playing with matches is dangerous
7. it took him 2 hours to write the essay
8. he is interested in playing board games
9. i suggest that we should use energy-saving bulbs to save electricity
10. we are looking forward to hearing from you as soon as possible
11 it's better to avoid travelling during rush hours
12 do you mind helping me to put the chairs away?
13 i don't mind looking after the baby for you
14 would you mind not asking me such questions