We are making a plan _________ water clean.
| A．make | B．to make | C．making | D．makes |
_________happily the children are flying kites!
| A．What | B．What a | C．How | D．How a |
—How long have you ____ the motorbike?
—For about two weeks.
| A．bought | B．had | C．borrowed | D．lent |
---_______ the Internet ___________ in your school?
---Yes, but the computer in our office has broken down.
| A．Is, used | B．Is, using | C．Does, use | D．Has, used |
— Could you tell me _____________ last night?
— Er, I was watching TV at home.
| A．what you were doing | B．what were you doing |
| C．what you are doing | D．what are you doing |
--- Whose shirt is this?
--- It _______ be Li Lei’s. It is too big for him.
| A．could | B．must | C．can’t | D．might |