—Must we keep the window _______ all the time?
—No, you don’t have to.
A.opening B.opened C. open
She parked her car outside the window ______,but next morning she found it missing.
| A．as usual | B．at first |
| C．at least | D．at all |
There’s smile on the teacher’s face. I think she’s ______ our work.
| A．worried about | B．pleased with |
| C．sorry for | D．afraid of |
—I’m not sure ______ Bill will come or not.
—No, he isn’t.
| A．when | B．if |
| C．whether | D．weather |
—I want to know ______ your son is.
—He is ten years old.
| A．how much | B．how old |
| C．how long | D．how many |
She told me the sun ______ in the east.
| A．rise | B．rose |
| C．rises | D．had risen |