Waking up listening true false exercise

People always used alarm clocks in the past.

Sunrise helped people wake up.

Roosters made sounds in the evening.

Church bells helped people know the time.

Factory workers did not need to be on time.

Alarm clocks were cheap during the Industrial Revolution.

Knocker uppers woke people up.

Knocker uppers used phones to wake people.

Candle clocks made noise at certain times.

Alarm clocks became more common in the 20th century.