As there is less and less coal and oil, scientists are exploring new ways of making use of （）energy, such as sunlight, wind and water for power and fuel.

单项选择题Some of you may have finished unit one.（）, you can go on to unit two.

A. If you may
B. If you do
C. If not
D. If so

单项选择题Children need friends（）their own age to play with.

A. of
B. for
C. in
D. at

单项选择题Who wrote The American7（）

A. Herman Melville
B. Nathaniel Hawthorne
C. Henry James
D. Theodore Dreiser

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

A. George Eliot
B. Iris Jean Murdoch
C. Doris Lessing
D. Muriel Spark

单项选择题Some parents are just too protective. They want to （）their kids from every kind of danger, real or imagined.

A. spot
B. dismiss
C. sheher
D. distinguish