—Is that your water bottle?
—_______.
| A．Yes, it is | B．No, it is | C．Yes, you are | D．Yes, you is. |
Can I wear my T-shirt?_____
A. No, you can't. B. Yes, you can't. C. No, you can.
It's cold ____ Beijing.
A. on B. in C. at
It's 9:45. It's time ____ music class.
A. to B. for C. of
Look at the clock, what ____ is it?
A. class B. time C. can
It's 10 o'clock. It's time ____ go to school.
A. to B. for C. of