He_______working till he was seventy years old.A.k
He_______working till he was seventy years old.
A.kept up
B.kept on
C.kept to
D.kept out
请帮忙给出正确答案和分析，谢谢！
参考解答
481***108
2024-12-26 16:40:22
正确答案：B
本题考查动词短语。keepondoing“继续”；keepup“保持”；keepto“遵循”；keepout“使在外面”。句意为：他一直工作到70岁。
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