She took an umbrella with her this morning ________ she should be caught in the rain．

A．so that

B．in order that

C．in case

D．now that

I'm sure the letter won't arrive in time ________ it is sent by arrive in time ________ it is sent by air．

A．if

B．until

C．because

D．unless

The Chinese are good at table tennis ________ the English are interested in football．

A．if

B．as

C．while

D．since

As they have planned,on Sunday a number of wildlife rescuers will go to the streets to call for teal animal rights．Surely they will draw the public's attention ________ they do it．

A．if

B．when

C．even if

D．though

What is disappointing is that it's just not that amusing,hard ________ those leading actors try．

A．even

B．as

C．so

D．however

People can find so many good things,such as useful information and lovely pictures on the Web,________ it is also a global village filled with bad things．

A．what

B．when

C．where

D．while

Money,________,has been the least of our worries．

A．important as it is

B．so important it is

C．important if it is

D．it is important though

— I'm going to change my present job．

— But ________ you fail?

A．how when

B．what after

C．which if

D．what if

He had made a mistake,but when he realized it,he took measures against the possible loss ________ it was too late．

A．until

B．when

C．before

D．as

— Dad,I've finished my assignment．

— Good,and ________ you play or watch TV,you mustn't disturb me．

A．whenever

B．whether

C．whatever

D．no matter