________to know Professor Zhang.
A. He said
B. I said
C. He is said
D. It says
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-I want to sit at the table near the window.-Sorry, _______already.
A. it took
B. it takes
C. it is taking
D. it has been taken
The letter three days ago and it yesterday.
A. had post, had arrived
B. was posted, arrived
C. posted,arrived
D. had been posted, was arrived
He told me that the final examination ______ next Thursday.
A. is given
B. will be given
C. would have given
D. would be given
发病学研究的内容是
A. 自稳调节紊乱的变化
B. 疾病发生的条件
C. 疾病发生的诱因
D. 疾病发生发展和转归的规律
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