题文
In __________ preparation for Shenzhou If, scientists need __________ knowledge of weather changes.
| A．the; the |
| B．a; / |
| C．/; a |
| D．the; a |
推荐试卷
In __________ preparation for Shenzhou If, scientists need __________ knowledge of weather changes.
| A．the; the |
| B．a; / |
| C．/; a |
| D．the; a |
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