口腔、咽喉、食管等急性炎症，尤其是腐蚀性炎症患者是胃镜检查的绝对禁忌证。
参考答案：对
---Who’s the man talking to our teacher?
---A professor_____a visit our school.
A．pays
B．to pay
C．paid
D．paying
Sandy feels unhappy because nobody seems to _____ her progress. [ ]
A. notice
B. look
C. watch
D. read
