He is so lazy．That's ________ makes him so poor．

A．when

B．where

C．what

D．why

I'm sure that building is on fire．________

— Well,look at the smoke pouring out from under the roof．

A．Oh,my god!

B．O,yes,but what to do?

C．Don't be silly．

D．So what?

It's really time we went home but we're enjoying ourselves．So we ________ here a little longer．

A．stayed

B．have stayed

C．stay

D．are staying

We will put off the sports meet until next week,________ the weather may be better．

A．which

B．When

C．since

D．and

These materials are the most important records we keep ________ those men's places,time and means of gambling．

A．for

B．on

C．up

D．of

In the office I never seem to have time until 6．p．m．，________ all my workmates have gone home．

A．that

B．which

C．Whose time

D．by which time

________ only did I know her,but I was her best friend．

A．If

B．Even

C．Not

D．Too

— How long does it take to get there?

— The road is less crowded today,I think we ________ arrive before dark．

A．would

B．should

C．must

D．could

— What do you think of ________ here so far,Rick?

— Well,I really enjoy meeting people here and exchanging lessons is also interesting．

A．it

B．that

C．this

D．them

Most amimals have little connection with ________ ani-mals of ________ different kind unless they kill them for food．

A．the;/

B．/;a

C．/;/

D．/;the