单项选择 较易0.85 引用1 组卷182
Yuan Longping has spent all his life ________ the research and ________ of rice plants.
| A．to; developed | B．on; develop | C．to; developing | D．on; development |
20-21九年级下·江苏苏州·阶段练习
知识点：developdevelopeddevelopingdevelopmentontospend time/money on sth. 答案解析 【答案】很抱歉，登录后才可免费查看答案和解析！ 立即登录
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