What _______ he doing?
| A．do | B．is | C．can | D．are |
—Humans can’t live _______ air.
—I agree with you.
| A．without | B．with | C．in | D．for |
____ up late at night is bad for your health.
| A．Stay | B．Staying | C．stays | D．Stayed |
— ____ do you clean the classroom?
— Three times a day.
| A．How long | B．How often | C．How soon | D．How many |
He prefers _______ to __________.
| A．swim, to skate | B．swims, skating |
| C．swimming, skating | D．to swim, to skate |
There _____ an exciting party at Mr. Wang’s this evening.
| A．will be | B．will have | C．are going to be | D．is going to have |