A.make sure that he got up early every day |
B.warn him when there were lizards in his house |
C.frighten burglars and tell him that somebody had got into the house |
D.make Mary feel safe to live in the large room |
A.set the alarm system |
B.make a telephone call |
C.give numbers to each of the three units in the downstairs rooms |
D.name his alarm system |
A.sound their own siren when the control unit told them to |
B.send a message to the control unit and start the siren |
C.check that the control unit worked properly all the time |
D.give them enough light |
A.nothing would happen |
B.the control unit would not work |
C.the siren would make a noise |
D.the dog would bark |
A.tell us that the alarm system doesn't work |
B.make it clear that he wants to give away his alarm system |
C.show us how the alarm system works |
D.tell us an interesting experience |