Mr. Smith is busy these days ________ a new book on how to develop a child’s reading skill. A．workin...
2023-01-20 05:07:27 147次 2010-2011学年四川省高二上学期九月月考英语卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Mr. Smith is busy these days ________ a new
book on how to develop a child’s reading skill.
|
A．working out
|
B．working on
|
C．working for
|
D．working with
|
本题链接：
