_______ meet Mr Wang, chairman of the trade union, he waited at the gate of the factory.
| A．In order that | B．So that | C．So as to | D．In order to |
Everyone in the village is very friendly. It doesn't matter ____ you have lived there for a short or a long time.
| A．why | B．how | C．whether | D．when |
（2012江西卷）It suddenly occurred to him he had left his keys in the office.
| A．whether | B．where | C．which | D．that |
As many five courses are provided, and you are free to choose ______ suits you best.
| A．whatever | B．whichever | C．whenever | D．wherever |
Scientists study ____ human brains work to make computers.
| A．when | B．how | C．that | D．whether |
（2012辽宁卷）The newcomer went to the library the other day and scarched for he could find about Mark Twain.
| A． wherever | B． however | C．whatever | D．whichever |