The engineers must have worked out the design by the end of last week，_______？
| A．mustn’t they | B．hadn’t they |
| C．haven’t they | D．didn’t they |
—Where did you see your friend?
—It was in the super market ____ I was doing shopping.
| A． where | B．which | C．that | D．when |
Grandma will appreciate ____ if her elder sister could come back from abroad.
| A．this | B．that | C．it | D．one |
Statistics show that men have ___ as women do for every mile they drive.
| A．serious accidents as twice many |
| B．twice as many serious accidents |
| C．twice serious accidents as many |
| D．serious accidents as many twice |
The government has decided to _____ those shabby old buildings so as to make way for the new and wide street ___ the beautiful West Lake.
| A．pull down; leading to |
| B．knock down; leads to |
| C．knock down; that leading to |
| D．knock off; leading to |
_____ for making so many mistakes in the exam, she was in low spirits.
| A．Having blamed | B．To blame | C．Blamed | D．To be blamed |