A.averageB.numberC.amountD.quantityLast year the number……

单项选择题William Sidney Porter, known as O. Henry, is most famous for ______.

单项选择题All of the following are well-known female writers in 20th-century Britain except ______.

单项选择题—How about your trip to Hainan — It couldn't have been ______. Sometimes I went swimming in the sea; sometimes I lay on the sand.

单项选择题______ she realized it was too late to go home.

单项选择题Some researchers feel that certain people have nervous systems particularly to hot, dry winds. They are what we call ______ weather sensitive people.