________ modeling business is by no means easy to get into,the good model will always be in demand．

A．While

B．Since

C．As

D．If

Jasmine was holidaying with her family in a wildlife park ________ she was bitten on the leg by a lion．

A．when

B．while

C．since

D．once

You can eat food free in my restaurant ________ you like．

A．whenever

B．wherever

C．whatever

D．however

Several weeks had gone by ________ I realized the painting was missing．

A．as

B．before

C．since

D．when

________ you call me to say you're not coming,I will see you at the theatre．

A．Though

B．Whether

C．Until

D．Unless

There were dirty marks on her trousers ________ she had wiped her hands．

A．where

B．which

C．when

D．that

Roses need special care ________ they can live through winter．

A．because

B．so that

C．even if

D．as

You'd better take something to read when you go to see the doctor________ you have to wait．

A．even if

B．as if

C．in case

D．in order that

________,Carolina couldn't get the door open．

A．Try as she might

B．As she might try

C．She might as try

D．Might she as try

The place ________ the bridge is supposed to be built should be ________ the cross-river traffic is the heaviest．

A．which;where

B．at which;which

C．at which;where

D．which;in which