题目

口算我最棒。570+20= 78-29= 270+130= 42÷7=650-300= 30×3= 210×2=202×4= 答案：570+20=590 78-29=49 270+130=400 42÷7=6 650-300=350 30×3=90 210×2=420202×4=808The couple went into the forest, but before long they became ______; they walked down  different paths. A. lost　　　　　　　　   B.missing　　　　　　  C.separated　　　　    D.reunited