单项选择题

For ten years the problem about the water has not been solved, we came to think that it has been a（）problem in this area.

A. perpetual
B. persuasive
C. picturesque
D. possessive

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单项选择题
You need to rewrite this sentence because it is（）. The readers will have difficulty in understanding it.

A. comprehensive
B. alternative
C. deliberate
D. ambiguous
单项选择题
In spite of the（）economic forecasts, manufacturing output has risen slightly.

A. gloomy
B. miserable
C. shadowy
D. obscure
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