1. doctor
2. special uniform
3. text with friends
4. challenging
5. teacher
6. learns maths and physics lessons
1 a
2 d
3 b
4 a
5 a
6 a
7 d
8 d
9 b
1 a
2 d
3 d
4 a
5 c
6 a
7 a
8 d
9 a
10b
2) you have to look after this tree very carefully
3) she doesn't have to correct my mistakes
4) we should invite cousins to the our wedding
5)today she shouldn' go outside without an umbrella
6) the boys must wash their socks every evenin
7)my son mustn't play with a lighter
8)can I have a day off?
9) you aren't allowed to shout in the museum
10)he could have gone to the station
<span>Animals do not go to the zoo.
Rob is not in school .
Rob does not go to the zoo every day.
Children do not like the zoo.</span>