—I often make mistakes _______grammar.
—Why not ask your teacher _______help?
| A．in; to | B．in; for |
| C．at; to | D．from; for |
—I often make mistakes _______grammar.
—Why not ask your teacher _______help?
| A．in; to | B．in; for |
| C．at; to | D．from; for |
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