- 问题详情: ThisweekendBobandhisfriendswenttoamountain.Whentheygotthere,theyputuptheirtents(帐篷)andthenrodetheirhorsestotheforesttoseehowthetreesweregrowing. Intheafternoon,whentheyweregoingback,itstartedtosnow.Tenminuteslater,theycouldn’tfindtheroad.Bobkn...
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