单项选择题

A．They are playing computer games.
B．They are driving a car.
C．They are watching a play.
D．They are cooking a meal.
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填空题
C
单项选择题
A．To let the children correct their own papers.B．To let the children measure their own understanding.C．To exam children and mark their papers.D．To help children to find the way to get right answers.
A．To let the children correct their own papers.
B．To let the children measure their own understanding.
C．To exam children and mark their papers.
D．To help children to find the way to get right answers.
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