When he was a little boy，he ______ on the farm.<br />A. used to working <br>B. used to work<br>C. got used to work <br>D. was used to work

When he was a little boy，he ______ on the farm.
A. used to working
B. used to work
C. got used to work
D. was used to work

出自：国家开放大学英语语法

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