下列属岩溶地貌的是（）
A. 桃源洞
B. 玉华洞
C. 冠豸山
D. 武夷山
In paragraph 1, "both sides of the Atlantic" probably refers to
A. the United States and United Kingdom.
B. the European and American.
C. the North America and Europe.
D. the North American continent and the British Isles.
According to the text, Downing Street No. 10 is in an awkward predicament of
A. real estate development.
B. gardening expansion.
C. hostility to scarcity.
D. economic recession.
种植乔木的分车绿带宽度不得小于( )。
A. 1m
B. 1.5m
C. 2m
D. 2.5m
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