Long ago in England, candles (1) ____________to tell time (to be used). Each candle
(2) ____________ into twelve parts by colours or by notches (to be divided). People
(3) ____________ how long it took for the candle to burn down to a notch or to a new colour
(to know). When three parts of the candle (4) ____________ down, an hour had passed by
(to burn). Each candle lasted four hours. Six candles (5) ____________ from one sunrise until the
next (to last).

У глагола Burn - есть две формы прошедшего времени burnt (старая форма) и burned - новая форма. Я взяла вторую форму.

Long ago in England, candles (1) ___were used___to tell time (to be used). Each candle (2) __was divided__ into twelve parts by colours or by notches (to be divided).

People  (3) _knew_ how long it took for the candle to burn down to a notch or to a new colour  (to know).

When three parts of the candle (4) __burned__ down, an hour had passed by  (to burn).

Each candle lasted four hours. Six candles (5) __lasted__ from one sunrise until the  next (to last).