Open the brackets and fill in the gaps. mind the positive or the negative forms of the imperative sentences. 1) (to switch off) your mobiles. 2) (to read) the instructions. 3) (not to feed) the animals in the zoo. 4) (to clean) your teeth. 5) (not to swim) in this lake. 6) (not to talk) to strangers.
2 read
3 don't feed
4 clean
5don't swim
6 don't talk