出生后就有可能发生感染的鼻窦是()
A．蝶窦
B．筛窦
C．上颌窦
D．额窦
E．以上都不是
参考答案：B
老师给同学买了3箱矿泉水，每箱24瓶，每瓶3元钱，这些矿泉水一共要花多少钱？（用两种方法解题）
—How did he get my telephone number?
—You ________ it . You told him last week．
A．should have forgotten
B．may have forgotten
C．must have forgotten
D．could have forgotten
