1949年9月,中国人民政治协商会议第一次会议选举()为中央人民政府主席。
A. 毛泽东
B. 刘少奇
C. 董必武
D. 周恩来
What effect does interferon have on infection?
A. It provokes a negative reaction.
B. It keeps healthy cells from becoming infected.
C. It causes healthy cells to grow.
D. It attacks viruses.
If I am not_____when you come to my office, ask for my secretary.
A. suitable
B. available
C. comfortable
D. proper
A.IB.meC.myD.mine
A. I
B. me
C. my
D. mine