以下函数实现的功能是( )。void fun (char *s){ char *p,*q, temp; p=s; q=s+ strlen(s)-1; while(p＜q) {temp=*p;*p=*q;*p=temp;p++;q--; }}

A．将一个字符串首尾颠倒

B．计算字符串的长度

C．统计字符串中的空格个数

D．将字符串中的小写字母变成大写字母

1) ______ the theory of language underlying the communicative approach
2) ______ the theory of learning underlying the communicative approach
3) ______ one of the objectives of the communicative approach
4) ______ one of the techniques of the communicative approach
5) ______ one of the main features of the communicative approach
a) language best learned through use in social context
b) to develop the students communicative competence
c) role play
d) the introduction of authentic texts into the learning situation
e) functional linguistics