问题
选择题
Tom does speak Chinese well, but his reading and writing skills leave much ______. [ ]
A. to improve
B. to be improved
C. being improved
D. having improved
答案
答案：B
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Tom does speak Chinese well, but his reading and writing skills leave much ______. [ ]
A. to improve
B. to be improved
C. being improved
D. having improved
答案：B