2. She (do) her makeup while she (talk) over the telephone.

2. She was doing her makeup while she was talking over the telephone.

Решение:

1. В данной задаче необходимо использовать Past Simple и Past Continuous.
2. В данном случае, оба действия происходили одновременно в прошлом, поэтому используем Past Continuous для обоих глаголов.

Ответ: She was doing her makeup while she was talking over the telephone.