He spends half an hour playing basketball every day同义句转换:He __half an hour__ basketball every day.快,

问题描述:

He spends half an hour playing basketball every day
同义句转换:He __half an hour__ basketball every day.
快,

he spends half an hour on basketball every day.
it takes him half an hour to play basketball every day
两者都可以。

expends, upon或on
expend upon(on) 在...花费(金钱、时间、精力等)

spends on

spends on