传染性非典型肺炎[严重急性呼吸综合征（SARS）]是一种新发现的什么传染病。（）
A.肠道
B.呼吸道
C.经血液传播的
D.以上都是
参考答案：B
—Where is your father?
—He _________ Beijing on business. He will be back soon.
A. has gone to B. has been to C. has been in
简论雕版印刷术的发明及其意义。
