(go) upstairs.

(not swim) is this lake.

(do) your homework

(not play) football in the yard.

(brush) your teeth.

 (not talk) during lesson.

(not feed) the animals in the zoo .

(read) the instructions

(not be) late for school.

(switch off) mobiles 

(ask) our brother .

(not use) pencil 

(hurry) up

(be) quiet 

(not call) the police 

(make) your beds

(mind) the gap.

(not tell) dad about my accidend

(not smoke) in the room

(help her) mother in kitchen

1. go

2. swim

3.do

4.play

5.brush

6.talk

7.feed

8.read

9.not

10. switch of

11.ask

12.use

13.hurry

14.be

15.call

16.make

17.mind

18.tell

19.not

20.help