11 the package had been wrapped carefully before they posted it
12 old men should be treated with respect by children
13 everything can be done by the computer
14 a new school is going to be built
15 that house isn't going to be bought
16 that building will be pulled down
17 the exercises won't be corrected by the teacher tomorrow
18 dangerous chemicals have to be kept in the safe place
19 the meeting had to be broken up by police
20 that room may be used for the classroom
