While building a tunnel through the mountain, ________．

A．an underground lake was discovered

B．there was an underground lake discovered

C．a lake was discovered underground

D．the workers discovered an underground lake

I planned ________ to see you last week, but I was ill．

A．to have come

B．to come

C．to be coming

D．to have been coming

The old man, ________ abroad for twenty years, is on the way to his motherland．

A．having worked

B．to have worked

C．to work

D．working

My parents used ________ they had to get a new car for my brother．

A．which

B．all what

C．what

D．不填

Chicago is on ________ Lake Michigan．There is nothing in the world like ________ Chicago meat industry．

A．the; the

B．不填；不填

C．the;不填

D．不填;the

－I can't find Mr．Smith．Where did you meet him this morning?

－It was in his office ________ he worked．

A．where

B．that

C．that

D．the one

The new manager is intelligent and hard-working, and ________ he is very charming．

A．moreover

B．therefore

C．however

D．instead

－Have you ever heard that Beijing toilet attendants will be required to learn English for the 2008 Olympic Games?

－Yeah, I ________ about it in The Beijing Morning Post．

A．had read

B．would read

C．read

D．will read

Alxander Ferguson was a worker on shipyards ________ he was 23, ________ he began to play professional football．

A．when; when

B．until; when

C．when; which

D．where; when

________ his enormous wealth, Buffet is famous for his simple lifestyle．

A．Because of

B．Despite

C．Though

D．Even though