—I have worked hard at math, but it seems that I haven’t made any progress. —Keep on _____ at it, and you will be successful. A. work B. working C. to work
Both parents were born 1970.
I’m talking to you ,Jack. Please listen to __________ carefully.
Look! Laura is getting the first place._____ fast runner she is!
On May 22, a Han taxi driver_____ an old lady to the hospital as soon as he could in Xinjiang.
_______ you study, _____ grades you will get.