妈妈乘公共汽车去上班花费约半小时.It takes_____my mom about half an hour_____the bus to work.
问题描述：
妈妈乘公共汽车去上班花费约半小时.It takes_____my mom about half an hour_____the bus to work.
妈妈乘公共汽车去上班花费约半小时.
It takes_____my mom about half an hour_____the bus to work.
答
妈妈乘公共汽车去上班花费约半小时.
It takes 【不填】 my mom about half an hour 【to take】the bus to work.
It takes sb some time to do sth 做某事花费了某人多长时间.