Look out! Don't get too close to the house ________ roof is under repair．

A．whose

B．which

C．of which

D．what

The little girl showed no anxiety before the competition．She seemed ________ for it pretty well．

A．to prepare

B．to have prepared

C．having prepared

D．to be preparing

________ I cannot understand is ________ she wants to resign her present job．

A．What; why

B．Which; how

C．That; why

D．What; which

________ fired, your health care and other benefits will not be immediately cut off．

A．Would you be

B．Could you be

C．Should you be

D．Might you be

I looked at it and found that including the wine, the bill ________ ＄70．

A．arrived at

B．got to

C．reached at

D．came to

________ the children to bed, she began to correct the students’ exercises．

A．Sending

B．Being sent

C．Sent

D．Having sent

Attracting ________ senior citizens, Florida is ________ home to the largest population of elder Americans．

A．不填；不填

B．the; the

C．the;不填

D．不填; a

My poor pet dog is seriously ill．I' m afraid it is ________ to die before long．

A．certain

B．likely

C．obvious

D．probable

Don't answer me with a simple "yes" or "no"．Explain ________ possible．

A．whoever

B．whenever

C．however

D．whatever

Facing the economic depression, every possible means ________ this year to save the company from going bankrupt．

A．has been tried

B．has tried

C．have been tried

D．have tried