单项选择题
A. in America B. one in America C. America D. that in America
The doctor suggests that a person （） exercises every da...
单项选择题The doctor suggests that a person （） exercises every day if he wishes to be healthy.
A. does B. did C. do D. will do
The used old small typewriter is really （）.A. a piece o...
单项选择题The used old small typewriter is really （）.
A. a piece of cake B. a piece of work C. a piece of junk D. a valuable machine
The birth rate in a city （）to fall as its gross domesti...
单项选择题The birth rate in a city （）to fall as its gross domestic product (GDP) rises steadily.
A. estimates B. anticipates C. assumes D. tends
