单项选择题

The Chinese government plans to buy at least ________ new models of Boeing’s 737 aircraft.

A．thirty
B．thirteen
C．sixteen
D．fifty
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单项选择题
Drought conditions in the following countries except ________ are tile worst in decades, slowing agricultural output.
A．Syria
B．Israel
C．Jordan
D．Palestine
单项选择题
Some experts say water problems contributed to war in 1967 between ________.
A．Israel and Syria
B．Israel and Jordan
C．Israel and Palestine
D．Israel and Egypt
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