【推荐1】______(use) for many years, the bike now needs repairing. (所给词的适当形式填空)

【推荐2】He has worked on the development of nuclear submarine, ________ (lead) his team to carry out research and development of a series of key models. (所给词的适当形式填空)

【推荐3】________(turn) around, we saw an old woman walking towards the river. (所给词的适当形式填空)

【推荐1】________ (occupy) with routine office tasks, she has little time with her family. （所给词的适当形式填空）

【推荐2】________ (occupy) myself in watching the vase, I had no time to appreciate other antiques in this shop. (所给词的适当形式填空)

【推荐3】________ (occupy) with teaching, she had no time for social activities. (所给词的适当形式填空)