— __________. That man got his books and left a few minutes ago.
A:I'm afraid so
B:I don't think so
C:I don't know
D:I hope not
lǎo shī de zhūn zhūn jiào huì duō me lìng wǒ nán wàng a!
____
1979年6月11日《人民日报》发表评论员文章《放开手脚大胆去写—三谈批透极左路线,贯彻“双百”方针》,1956年以来的双百方针得到恢复。下列适合双百方针主旨的口号是( )