题目内容：

    Emma and Emily are twins. They look so similar that even their parents have d1.telling the differences between them just by appearance. But actually the girls are different in most other ways. For example, Emma likes spicy food, while Emily p2. sweet food. Emma loves the color indigo, while Emily loves the color violet. Emma likes studying at night, while Emily would r3. do it in the morning.

So the twins often argue (争论) about lots of things. Here is a real case. When Emma saidwaking up early in the morning was terrible, Emily argued. “Mornings are fresh. The air in the morning can always c4. me up. On the contrary (相反), I think it's difficult to stay up late when you feel so sleepy!” In the end, their parents made a d5. to put an end to their argument and taught them that they could b6.be correct. But the girls remained skeptical (怀疑的).

That day, their father s7. Emma stand on one side of a board and Emily on the other side. They couldn’t see each other's side. Their father asked, "What color is the board, girls?” Emma said it was black, while Emily said it was white. They started arguing again. The father asked them to c8. places. They were both quite surprised to d9. that the board on Emma’s side had been painted black and on Emily’s side had been painted white. Both of them were correct.

Many of us are just like Emma and Emily. We may insist (坚持) that we are right most of the time, only to find out that o10. can be right as well.