牙周病和牙髓病可通过下列途径彼此相互联系、相互影响()
A．根尖孔
B．侧支根管
C．牙本质小管
D．以上都是
E．以上都不是
参考答案：D
The man's name is Mike Green. We can call (称呼) him _______. [ ]
A. Mr Mike
B. Mr Green
C. Sir Green
D. Mike
Last year my brother g______ from Beijing University and found a job there.
