在if---else语句格式中，else后面也可以有表达式，代表else下的条件。

下面对switch语句和if---else if---else语句的描述正确的有哪些？ A: 一般情况下，在实现选择结构时两个语句可以相互替换。 B: switch语句通常处理 case为比较确定值的情况， 而 if…else if…else语句更加灵活，常用于范围判断(大于、等于某个范围)。 C: switch 语句进行条件判断后直接执行到程序的条件语句，效率更高，而if…else if…else语句有几种条件，就得判断多少次。 D: 当分支比较少时，if…else if…else语句的执行效率比 switch语句高。 E: 当分支比较多时，switch语句的执行效率比较高，而且结构更清晰。

__would like to go to the park with me? A: Whom else B: What else C: Who else D: Else who

This pen is not mine, it must be ____. A: somebody else's B: somebody else' C: somebody's else D: somebody' else

If that pen is not hers, ____________ can it be? A: who else B: whose else's C: who else's D: who's else

6． Do you have _________ to tell me? A． something else B． else something C． else anything D． anything else

-Whose umbrella is it?-It's ________. A: somebody else's B: Somebody else C: Somebody's else's D: Somebody's else

I want to know ____ I can do for you. A: how else B: what else C: when else D: where else

下面哪种结构不是分支结构（ ） A: if B: if……else C: for D: if……else if……else

________, we left. ( ) A: There has nothing else to do B: There being nothing else to do C: There was nothing else to do D: There were nothing else to do