__ is really hard __ them to climb Mount Tai.
| A．This, to | B．It, to | C．This, for | D．It, for |
It’s quite exciting________me________the Internet．
A．for，surf
B．for，to surf
C．for，for surf
The river is about six thousand six________and seventy kilometers long．
| A．hundred |
| B．a hundred |
| C．hundreds |
| D．hundreds of |
—Thanks________joining the Talk Show！
—You’re welcome．
| A．by |
| B．on |
| C．of |
| D．for |
The accident happened________7 p．m．________9 p．m．
| A．from，to |
| B．between，to |
| C．from，and |
| D．between，and |
—How far is it from the railway station to the hotel？
—It’s about________walk．
| A．ten minute’s |
| B．ten-minutes |
| C．ten minutes’ |
| D．ten minutes |