在我国，对香港、澳门特别行政区行政首脑的称谓是：()
A. 行政长官
B. 主席
C. 区长
D. 书记
Original receipts must be presented to get reimbursed in order to_______ your spending while going on a business trip.
A. reverse
B. claim
C. justify
D. assure
The general manager has determined to delegate one of her duties to his staff rather than
A. his
B. himself
C. themselves
D. itself
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