Put the verbs in brackets into the correct infinitive or -ing form.

1 a) After thieves stole his wallet, Percy stopped walking (walk) through the park at night.
b)The police car stopped.......... (check) that we were OK.
2 a) She forgot..........(tell) her parents about the phone call.
b) I'll never forget ........... (go)home only to find out thieves had broken in.
3 a) They tried......... (put out)the fire, but they couldn't.
b) You should try...... (put) a CCTV camera in your shop. (put)
4 al remember(talk) to the victim before the crime.
b)Remember............. (lock) the back door when you leave the house.