单项选择题

A．Irrigating desert areas.
B．Use for cold seawater.
C．Techniques for preserving the environment.
D．The importance of conserving energy.
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单项选择题
A．They want to have an up-to-date knowledge of English.B．They learn English to find well-paid jobs.C．They know clearly what they want to learn.D．They want to change the way English is taught.
A．They want to have an up-to-date knowledge of English.
B．They learn English to find well-paid jobs.
C．They know clearly what they want to learn.
D．They want to change the way English is taught.
单项选择题
A．He is not equal to the job.B．He is not well paid for his work.C．He doesn’t think the job is challenging enough.D．He cannot keep his mind on his work.
A．He is not equal to the job.
B．He is not well paid for his work.
C．He doesn’t think the job is challenging enough.
D．He cannot keep his mind on his work.
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