1 his watch was broken by him
2 The students were explained the rule by teacher
the rule was explained by teacher
3 I often am asked to help them by him
4 written exercises usually are done in class by them
5 a new discover will be made soon by her
6 a report will be made by Steve at the conference
7 tennis is played all year round by them
8 Their children are usually sent to camp for summer
9 several jobs are offered me by manager
10 you will be promised much by them but don't imagine they will give you everything