已经证实，小组学习有助于提高学习效率。 (It is done that…)

1. 已经证实，小组学习有助于提高学习效率。 (It is done that…)

【考点】

动词的语态; 固定短语; 现在完成时; 主语从句; it的用法;

【答案】

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句子翻译困难

1. To ensure the safety of the children, it is necessary that children under 14 should be (陪伴) by an adult when entering the park.

单词拼写（单句）普通

2. In France, the gesture for"OK"may (interpret) as meaning zero.

语法填空（单句）普通

3. The patient was (perceive) to have difficulty in breathing.

语法填空（单句）普通