Past simple and past continuous

I ___ (hear) a new song on the radio.

I ___ (read) three books last week.

They ___ (speak) French to the waitress.

He ___ (understand) during the class, but now he doesn't understand.

I ___ (forget) to buy some milk.

She ___ (have) a baby in June.

You ___ (lose) your keys last week.

They ___ (swim) 500m.

I ___ (give) my mother a CD for Christmas.

At the age of 23, she ___ (become) a doctor.