Section A限时训练 一,1.babysitting .2.vacation 3.away 4.sends 5.postcards 二.1.hiking 2.camping 3.to visit 4.going 5.babysitting 三.1.A 2.B 3.D 4.C 5.B 6.B 7.C 四,1.busy 2.over 3.flies 4.during 5.enjo...