单项选择题

The Social Security Retirement Program is made up of two trust funds,（）could go penniless by next year.

A. the larger one
B. the larger of which
C. the largest one
D. the largest of which

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单项选择题

（32）（）

A. package
B. holiday
C. festival
D. celebration

单项选择题

Which of the following details about the fiver is CORRECT（）

A. 600 kilometers of it are in critical condition.
B. 30% of it is seriously polluted.
C. It provides 35% of China’s total water resources.
D. 35% of its major tributaries are in danger of pollution.