Mr Smith works in a factory in the middle of the city. The factory is not far from his home. It is about 800 meters away. So Mr Smith doesn’t go to work by bus. He usually goes there by bike, sometimes he walks to work. It takes(花费) him 10 minutes to get there by bike or 20 minutes on foot. He usually leaves home at ten minutes to eight. Today something is wrong with his bike. He wants to walk there. His work starts at half past eight in the morning and finishes at a quarter(一刻钟) to five in the afternoon.
根据短文内容，选择正确答案。
What does Mr Smith do?

A．He is a worker.	B．He is a teacher.
C．He is a doctor.	D．He is a farmer.

Why doesn’t Mr Smith go to work by bus?

A．Because there is no bus.

B．Because his factory is not far from his home.

C．Because he likes riding a bike.

D．Because he doesn’t like taking a bus.

How long does it take Mr Smith to walk to work?

A．Twenty minutes.	B．Forty minutes.
C．Ten minutes.	D．Half an hour.

What time does Mr Smith usually leave home?

A．8:10.

B．7:50.

C．7:10.

D．8:50.

Mr Smith usually goes home from work at ______ in the afternoon.

A．4:15.

B．4:45.

C．4:35.

D．4:05.