Some scientists think that it may take ______years to make robots look like people, and do the same things as us.
| A．hundreds of | B．two hundreds of |
| C．two hundreds | D．two hundred of |
| A． three | B．month | C． thank | D．With |
—How long does it take you to go to the bus station?
—______.
| A．About twenty kilometers | B．I ride my bike |
| C．About half an hour by subway | D．I get there quickly |
Sam has a bike. He ______ it to school every day.
| A．takes | B．rides | C．walks | D．drives |
For some students, it’s difficult ______ school.
| A．to get to | B．get to |
| C．to get | D．get |
—______ is it from your school to the train station?
—Five kilometers.
| A．How’s | B．How old |
| C．How long | D．How far |