LiYang, a famous English expert, will deliver a speech telling us a good way to have our oral English______in a short period.
A. to improve    B. improving     C. improved    D to be improved
C
本題考查have sth done結(jié)構(gòu)。因oral English與動詞improve之間為被動關(guān)系，故選C項。注意D項盡管表示被動，但沒有have sth to be done結(jié)構(gòu)。
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