问题补充：
30. Please write a notice for the students and .
A. put it up
B. put up it
C. put it on
D. put on it
答案：
(答案→)A. put it up
B. put up it
C. put it on
D. put on it
解析：put on穿上；put up张贴；译文:请为学生写一个通知，并将它张贴好。凡是以in, up, on, away, down等结尾短语动词后面的代词应该放在短语的中间。
