Wecanneverexpectbluerskyunless-优题课

We can never expect ____ bluer sky unless we create _____ less polluted world.

A．a; a

B．a; the

C．the; a

D．the; the

科目英语题型单选题难度较易

Whenever he worked until midnight, hedrink some coffee to get refreshed.

—Which of the two poems do you like most?
—shorter one, of course. I think it’s reallymost interesting one.

—Don’t you feel cold, Jack? You wear such a thin coat in a day at —5℃.
—, I’m belling.

They are now in great need of help. So your support will certainly make a ____.

______ twice, the postman refused to deliver our letters unless we chained our dog.