What does it mean by "Buses leave every hour on the hour"？
A. Buses leave every two hours.
Buses leave every one and half hours.
C. Buses leave every hour such as nine o'clock, ten o'clock, and so on.
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Hong Kong dollar can be exchanged(兑换) freely in the international(国际) money market.
A. Right.
B. Wrong.
C. Doesn't say.
甲公司向乙银行贷款1000万元，约定2005年12月2日一次性还本付息。丙公司以自己的一栋房屋作抵押。甲到期没有清偿债务，乙银行每个月都向其催收，均无效果．最后一次催收的时间是2007年3月6日。乙银行在下列哪一时间前行使抵押权，才能得到法院的保护？（）。
A. 39418
B. 40149
C. 39878
D. 40608
The dictionary______me $20.
A. cost
B. spent
C. paid
He will be a teacher,______he？
A. is
B. does
C. won't
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