In many cities of China, if an ambulance is＿＿in a traffic jam, police will respond to the emergency.
A. held up B. held back
C. held down D. held out
一I think I saw Mr. Smith at yesterday's party.
一He＿＿there. He is now on a business trip in Greece. And he left the day before
yesterday.
A. mustn't have been B．couldn't have been
C. might not be D. should not be
Until we lose them, scarcely＿＿ how much pleasure and happiness our ordinary lives offer.
A．we realize B．do we realize
C. did we realize D. we have realized
--- Mr. Li will drive us to Shanghai tomorrow.
一But I suppose taking a train would be a better choice: He＿＿like crazy, you know.
A. drives B. will drive
C. is driving D. drove
The most challenging job for game designers is to make their games interesting＿＿．
A. to play B. to be played
C. played D. being played
--- I don't remember having ever seen John since last week. Has he gone somewhere?
一Not really. He＿＿his newly-bought apartment.
A. has decorated B．was decorating
C. decorated D. has been decorating
