Come on, please give me some ideas about the project. — sorry, with so much work _____ my mind, I almost break down.

y places in China, bicycleis still poplar means oftransportation.

The U.S.A. is a country while China is a country.

I am really surprised that a policeman in his car _____ have hit several common pedestrians, killing one and injuring three.— Yes, If one _____ ask for trouble, what can we say?[ ]

One of the difficulties we have Englishis how to remember new words and expressions. A.to learn B. in learning C. learn D. learned