单项选择题
The subject ______ we are going to turn is about English studies.
单项选择题 Everyone except Tom and John ______ there when the class began.
单项选择题 —Have you ever been to Tibet—Yes. I have fantastic ______ of my trip there last summer.
单项选择题 In a few years an intelligent computer will certainly be an ______ diagnostic tool for doctors.
