During or While · exercise 1

I met a lot of interesting people while I was in China.

I met a lot of interesting people during my trip in China.

We met a lot of interesting people during two weeks in China.

While my mother was seeing the doctor, I read a book.

During my mother’s visit to the doctor I read a book.

I had been away for many, many years. During that time a lot had changed.

I woke up five times during the night.

The phone rang five times during one hour.