Ⅰ. 单项选择（30分）
( )1. The Yangtze River is the longest river in Asia, which is _______.
A. 6, 300-kilometers-long B. 6, 300-kilometer-long
C. 6, 300 kilometers long D. 6, 300 kilometer long
( )2. The beautiful flowers in the park _______ many tourists.
A. attracted B. brought C. paid attention to D. enjoyed
( )3. _______ heavy rain in South China recently.
A. There have been B. There has been
C. There was D. There were
