---May I open the window to let in some fresh air?
---________.
A. Take care B. Hold on C. Go ahead
---Is that your book ? ---Yes, ________.
| A．it is | B．it isn’t |
| C．it’s | D．this is |
I ________ two baseballs and my friend ________five baseballs.
| A．have; have | B．have; has |
| C．has; have | D．has; has |
---This is my sister Ann. ---Is _____ a student?
| A．she | B．he | C．her | D．His |
________you play the violin?
| A．Are | B．Can | C．Is | D．When |
My father usually takes a shower _________the morning.
| A． in | B． for | C． on | D． At |