单项选择题

A．It is being raised each year.
B．It remains constant.
C．It will reach sea level in 9,000 years.
D．It is being lowered gradually.
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单项选择题
A．They spent ＄300 on their vacation.B．They drew more money than they have from the bank.C．They lost their bankbook.D．They had only ＄300 in the bank.
A．They spent ＄300 on their vacation.
B．They drew more money than they have from the bank.
C．They lost their bankbook.
D．They had only ＄300 in the bank.
单项选择题
A．Wearing down the soil.B．Building up land.C．Enriching the soil.D．Loosening more earth.
A．Wearing down the soil.
B．Building up land.
C．Enriching the soil.
D．Loosening more earth.
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