-- Are these pens ? ---Yes, ______.
As we know, water is very important _______ us. A. of B. to C. on
Would you mind _____ the room? A. cleanB. cleaning C. to clean
-----What’s _____matter with you? ------I have_____ flu A. the, / B . /, the C. the, the
The twins didn’t go to the theatre, they ______ the light music all night.
If you can’t find the place, I will show you _______.