—Let's give her some books her birthday.
—That's a good idea!
A:to
B:in
C:by
D:for
民国十八年七月,国民政府颁布《特种工业奖励法》;次年二月又公布《特种工业奖励标准》,民国二十三年又将其修改为《工业奖励法》。这些做法( )
—Indeed! One more step and he ________ off the cliff(悬崖).