题文
—When did you meet Jack for the first time？
—I met him________the airport________National Day．
| A．at；in |
| B．at；on |
| C．on；in |
| D．on；at |
—When did you meet Jack for the first time？
—I met him________the airport________National Day．
| A．at；in |
| B．at；on |
| C．on；in |
| D．on；at |
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