Every evening after dinner, if not ________ from work, I will spend some time walking my dog.

A．being tired 

B．tiring

C．tired 

D．to be tired

Not a single paper ________ without spelling mistakes this term.

A．did Tom write 

B．Tom did write

C．Tom wrote 

D．wrote Tom

The Greens must have been to the 2010 Shanghai Expo，________ they?

A．hadn't 

B．didn't

C．can't 

D．weren't

—What's all that noise?

—Just in front of the bus ________ an injured man, all covered with blood.

A．where lies 

B．lies

C．does lie 

D．is lying

For a moment nothing happened, and then ________ all shouting together.

A．voices had come 

B．came voices

C．voices would come 

D．did voices come

Seldom ________ computer games ever since he entered college.

A．did he play

B．has he played

C．he played

D．he has played

In front of the house ________ with a history of 100 years.

A．does a tall tree stand

B．stands a tall tree

C．a tall tree is standing

D．a tall tree stands

It was during his encouragement ________ I always sensed his great unspoken love.

A．when 

B．that

C．where 

D．which

Not until I came home last night ________ to bed.

A．Mum did go 

B．did Mum go

C．went Mum 

D．Mum went

Some of you may have finished unit one. ________， you can go on to unit two.

A．If you may 

B．If you do

C．If not 

D．If so