有下列函数定义：

int fun(double a,double B)

return a*b;

若下列选项中所用变量都已正确定义并赋值，错误的函数调用是( )。

A．if(fun(x,y))……

B．z=fun(fun(x,y),fun(x,y));

C．z=fun(fun(x,y)x,y);

D．fun(x,y);

Directions:

You just spent your summer holidays in Tom’s hometown, Tom’s home is at a small and quiet countryside. Now, you are going to write him a letter of thanks for all he and his family did for you during your stay there.

Imagine some details of the summary holidays. Write your letter in no less than 100 words. Write it nearly on ANSWER SHEET 2.

Do not sign your own name at the end of the letter; use "Li Ming" instead.

Do not write the address, (10 points)