The woman .................. to the headmaster will make a speech about protecting the environment.
A. talks B. will talk C. talking D. talked
5. Do you mind if I .................... the front seat of the taxi?
A. sit B. sat C. sitting D. to sit
6. It is a ..................... drive from here to the city center.
A. twenty - minutes B. twenty minutes
C. twenty-minute D. twenty minute