根据汉语完成句子,每空一词。
消防员们只用了20分钟就扑灭了那场大火。
It only ________ the firefighters twenty minutes to ________ out the fire.
你去过盐城科技博物馆多少次了?
________ ________ ________ ________ ________ ________ ________ yancheng Science and Technology Museum?
蒂娜年纪太小,不能照顾自己。
Tina is ________ young that she can't look after________.
我已经参加了许多演讲比赛。
I________ already________ a lot of________ ________.
你每天花多长时间做家庭作业?
How ________ does it ________ you to do your homework every day?,
下列各句中均有一处错误,请指出并改正。