单选题 Applications for the Hamilton School of Business scholarship must ______ by June l in order to be considered.
A. be mailing B. mails
C. be mailed D. mail

【正确答案】 C
【答案解析】[解析] 主语applications需要被邮寄，从而可以知道它和动词mail为被动关系，正确答案为被动语态的C。