79. (单选题) In addition, teaching staff is willing __________ extra help if a student needs(本题1.0分) A、 to providing B、 to provide C、 provide D、 provided

79. (单选题) In addition, teaching staff is willing __________ extra help if a student needs(本题1.0分)
A、 to providing
B、 to provide
C、 provide
D、 provided

出自：陇东学院-大学英语2(专升本)

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