﹣The plane won't take off ______ the thick clouds move away.( )
﹣﹣Let's wait patiently for the announcement from the airport.
A.sinceB.thoughC.whileD.until
---_________ the door, please.---Please come in. The door________.
I don’t think it is a good idea, ________ ? A. isn’t it B. is it C. do we
Some of the apples are bad,but I believe the rest sweet.
--- Can you tell me where Tom is? --- He ________ on the playground. A. plays B. playing C. is playing
-- _______ bad weather! -- So it is. A. What B. How C. What a