Ответ:

  1. He / drink two cups of coffee in the morning.
    • (+) He used to drink two cups of coffee in the morning.
    • (-) He didn't use to drink two cups of coffee in the morning.
    • (?) Did he use to drink two cups of coffee in the morning?
  2. She / laugh a lot when she was younger.
    • (+) She used to laugh a lot when she was younger.
    • (-) She didn't use to laugh a lot when she was younger.
    • (?) Did she use to laugh a lot when she was younger?
  3. Tom / read science fiction stories when he was 14.
    • (+) Tom used to read science fiction stories when he was 14.
    • (-) Tom didn't use to read science fiction stories when he was 14.
    • (?) Did Tom use to read science fiction stories when he was 14?
  4. People / have large families in the past.
    • (+) People used to have large families in the past.
    • (-) People didn't use to have large families in the past.
    • (?) Did people use to have large families in the past?