填空题

The problem_________________________________(过支一直没有解决).

【参考答案】

The problem remained unsolved in the past.
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单项选择题
Farmers can save a considerable amount of pesticide by ______.
A．resorting to spot-spraying
B．consulting infra-red scanning experts
C．transforming poisoned rain
D．detecting crop problems at an early date
单项选择题
Which of the following is NOT MENTIONED in the third paragraph
A．Group work gives pupils the opportunity to learn to work together with others.
B．Pupils also learn to develop their reasoning abilities
C．Group work provides pupils with the opportunity to learn to be capable organizers.
D．Pupils also learn how to participate in teaching activities.
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