Read the following announcement and write the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blank from 20 to 23.

ANNOUNCEMENT

If You Smell Gas at Home

+ Do not turn (20)_______ any lights or devices.

+ Open the windows and doors.

+ Leave (21) _______ house immediately.

+ (22)_______ emergency services or the gas company once you are outside.

+ Stay away from the house until it is (23)_______.