— May I open the window to let in some fresh air?

—          [      ]

A. Come on!    

B. Take care!    

C. Hold on!      

D. Go ahead!

用所给词的适当形式填空

小题1:His mother made him __________( clean ) all the rooms in two hours.

小题2:A good _______________( begin ) makes half success（成功）.

小题3:Do you know the ________(high)of Yao Ming?

小题4:Summer may be the _____________ (good) time to swim in the river .

小题5:She writes_______(careful)enough．

小题6:Could you tell me how ______(get) to the hospital?

小题7:We spent a lot of time _____(do)our homework last night.