2. 外语
  3. He ______ working till he was seventy years old.

He ______ working till he was seventy years old.

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问题 He ______ working till he was seventy years old.
选项 A、kept up
B、kept on
C、kept to
D、kept out
答案B
解析 本题测试keep动词短语的用法。keep up：持续， keep on,继续做某事；keep to；遵循，不偏离；keep out：留在外面。根据句意只有B为正确选项。句子的意思是：“他一直工作到七十岁。”
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成人本科学位英语

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