—Do you like math?
—Yes, it’s difficult ________ really interesting.
| A．but | B．and | C．or | D．so |
The students can’t __________ TV.
A. watch always B. always watches C. always watch
----What do you do after class?
-----Sometimes, I talk __________ my friends.
A. in B. of C. to
Would you like _________ to music?
A. listen B. to listen C. listening
Seven _________ workers work in that factory.
A. thousands of B. thousands C. thousand
There are many _________ on the table.
A. potato B. water C. potatoes