现代城市发展的主要动力是（）
A.第三产业
B.工业
C.手工业
D.农业
参考答案：A
Mum, this t-shirt is too small. Would you buy me a one?
A．nice
B．large
C．nicer
D．larger
To understand the grammar of the sentence, you must break it ________ into parts.
A. down
B. up
C. off
D. out
