---George, how can you prove the earth is round ?--- I can’t, sir. ______ , I never said it was.
This pair of shoes ____________ $80.
Do you have ______________ to tell me?
Our teacher told us _______________ carefully in class.
Look! They _______________ a picnic.
Wang Wei never ___________ the plane to the USA. A. by B. takes C. take D. on