Convert the active sentences below into the passive, if possible. Specify, for each of them, the complementation pattern of the verb, choosing from one of the following options.

(a) transitive verb: V + NP

(b) transitive verb: V + that clause

(c) transitive verb: V + -ing clause + NP

(d) transitive verb: V + to-infinitive + NP

(e) transitive particle verb

(f) transitive verb: V + NP + to-infinitive

(g) transitive verb: V + NP + bare infinitive

(h) V + Prepositional Object

(i) Verb with two complements: V + DO + OC

(j) Verb with two complements: V + IO + DO

1. More than 400,000 people have visited the exhibition.

2. She enjoys buying old plates at the junk market on Sunday morning.

3. My teacher says that maths is not as difficult as people like to believe.

4. All my friends consider this paper to be pure nonsense.

5. She called upon her friends for the removal.

6. The chairman declared the meeting open.

7. The secretary typed up the minutes of the meeting.

8. She sent all board members a copy.

9. My boss decided to hire a technical assistant on the project.

10. I saw her slip a packet of biscuits into her bag.