Lawrence Craven, a doctor from the USA, is the author of several published reports, one of ________ introduced the idea in 1953 ________ aspirin could reduce the risk of heart attacks.
| A．them; when | B．which; that |
| C．what; that | D．which; when |
Most of ______ we call geniuses are successful only because they have made extraordinary efforts.
| A．which | B．that | C．whom | D．what |
-------May I borrow your paper?
------ ______.
| A．By all means | B．Never mind | C．You are welcome | D．Don’t mention it |
．It was one in the morning the fire broke out.
| A．that | B．how | C．which | D．when |
．In front of the house with a history of 100 years.
| A．does a tall stand | B．stands a tall tree |
| C．a tall tree is standing | D．a tall tree stands |
Luckily, we’d brought a road map without we would have lost our way.
| A．it | B．which | C．this | D．that |