10．Listen to the passage and complete the following sentences （听短文完成下列内容，每空限填一词） 21．People call recreational vehicles （RVs） houses略． 22．This RV is略for a family who has spent every hour of every day略． 23．You can drive as long as you like without略finding hotels and restaurant． 24．When you come across略on the road，you can go camping with them． 25．RVs can sometimes略and you have to spend time mending them．
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B．
C．
