题目内容
Many of the children ________ some difficulty in learning the material.
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His facial ________ told me that he didn’t want to discuss the issue.
Motoring organizations have started a(n) ________ for safer roads.
Given the general ________ of his health, it may take him a while to recover from the operation.
To secure our future, we need a(n) ________ economic strategy.
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