He used to ____his teaching when he was young. A．devote to B．be devoted to C．devoting to
Heusedto____histeachingwhenhewasyoung.A．devotetoB．bedevotedtoC．devotingtoD．beingdevot...
He used to ____his teaching when he was young. A．devote to B．be devoted to C．devoting to D．being devoted to
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| B |
| used to 接动词原形表示”过去常常”；”致力于”应该是devote one-selt to 或be devoted to…，所以答案为B。 |
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