Jenny hopes that Mr. Smith can suggest a good way to have her written English in a short period.
A. improve
B. improving
C. to improve
D. improved
网友回答
A. improve
B. improving
C. to improve
(答案→)D. improved
解析：考查非谓语动词。本题考查have sth. done过去分词作宾语补足语，故选D。