_____ have you been swimming? For five years.
| A．How many times | B．How long |
| C．How often | D．How much |
The Smiths are looking forward to ________ Kunming some day.
| A．visit | B．visiting | C．visited | D．to visit |
This kind of on-line game _______ a group of teenagers in China.
| A．is made of | B．is made by | C．is made from | D．is made in |
They told me the place ______ the car accident ______.
| A．that, take place | B．that, happen |
| C．where, take place | D．where, happened |
---Can I ask you a question?
--- No, you________. You _______to ask me questions during exams.
| A．can’t, mustn’t | B．can’t, aren’t supposed |
| C．can, aren’t supposed | D．can, don’t have |
Attention, please. Sorry to tell you the flight has to be ______because of the heavy snow.
| A．put away | B．put up | C．put off | D．put on |