These days students in some schools ______ not to use mobile phones.
| A．ask | B．asked | C．are asked | D．were asked |
The traditional Chinese lunar calendar ________ a year ________ 24 solar terms (节气).
| A． |
divides…into… |
B． |
mixes…with… |
C． |
translates…into… |
D． |
covers…with… |
—________ do you play volleyball, Amy?
—Three days a week.
| A． |
How long |
B． |
How soon |
C． |
How often |
D． |
How much |
The public sign 
in the library means people ________ smoke there.
| A． |
could |
B． |
must |
C． |
couldn’t |
D． |
mustn’t |
We are ________ that the Great Wall is one of the wonders of the world.
| A． |
friendly |
B． |
brave |
C． |
nervous |
D． |
proud |
We learned ________ to work as a team by completing the task.
| A． |
what |
B． |
which |
C． |
how |
D． |
who |