单项选择题

A．Uses of cold sea water.
B．Irrigating desert areas.
C．Techniques for preserving the environment.
D．Techniques of cultivating plants.
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单项选择题
A．Where the manager is now.B．Who will be his new manager.C．Whether his manager is iii.D．When the manager will go to the headquarters.
A．Where the manager is now.
B．Who will be his new manager.
C．Whether his manager is iii.
D．When the manager will go to the headquarters.
填空题
G
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