— No problem.
A:you bought
B:you bought it
C:that you bought it
D:which you bought it
挑出不恰当的字填写在后面横线上。
退(朝 潮)____ (底 低)____头 满(载 栽 裁)____而归
沙(滩 摊)____ (摊 捡)____贝壳 兴奋(极 级 急)____了
若ab=35,则2a+bb的值是( )