下列做法有利于我们理解父母的有[ ]
A、宽容父母的一切过错
B、将心比心，换位思考
C、给父母送生日礼物
D、帮助父母做家务
答案：B
小青、小红和小南都是三（2）班的同学，他们的学号正好是相邻的自然数，已知三人的学号和是48，他们的学号分别是______、______、______．
— What a pity! You ________ it down on your notebook.
— Oh, my god! I forgot his mobile phone number.[ ]
A. could have written
B. should have written
C. must have written
D. would have written
