题文
Are you clear _____ what has been taught in this class? That is: Is everything that has been taught in this class clear _____ you?
| A．with; with | B．about; about | C．about; with | D．about; to |
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Are you clear _____ what has been taught in this class? That is: Is everything that has been taught in this class clear _____ you?
| A．with; with | B．about; about | C．about; with | D．about; to |
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