1. Around 1890, some people ___ to work. (cycle)
2. People ___ drive cars in the 18th century.
3. ___ people ___ have mobile phones in the 19th century?
4. They ___ travel by train and ship before the invention of aircraft.
5. Transport ___ be much slower three hundred years ago.
6. In the past, it ___ be important to know how to ride a horse.
7. All kinds of people ___ ride bikes around 1819.

1. Around 1890, some people used to cycle to work.

2. People didn't use to drive cars in the 18th century.

3. Did people use to have mobile phones in the 19th century?

4. They used to travel by train and ship before the invention of aircraft.

5. Transport used to be much slower three hundred years ago.

6. In the past, it used to be important to know how to ride a horse.

7. All kinds of people didn't use to ride bikes around 1819.

Объяснение:

• Used to + глагол — действие или состояние, которое было привычным в прошлом.

• Didn't use to + глагол — отрицательная форма, означающая, что раньше чего-то не делали.

• Did + подлежащее + use to + глагол? — вопросительная форма.

После did и didn't всегда пишется use to, а не used to.

В предложениях 2, 4 и 7 также возможны формы couldn't, could и couldn't соответственно, если упражнение предполагает использование could для обозначения возможности или способности в прошлом.