. Statistics ________ that most of the published and quoted scientific articles are related to medical science.
| A．has shown | B．is shown | C．show | D．shows |
Mr. Alcott told me that four fifths of the houses __________.
| A．have been sold out | B．had been sold out |
| C．were sold out | D．was sold out |
-Got your driving license?
-No. I __________ too busy to have enough practice, so I didn't take the driving test last week.
| A．was | B．am |
| C．have been | D．had been |
The new suspension bridge __________ by the end of last month.
| A．has been designed | B．had been designed |
| C．was designed | D．would be designed |
The fire was finally __________ after the building had __________ for two hours.
| A．put off; caught fire | B．put away; been on fire |
| C．put out; been on fire | D．put down; caught fire |
The patient was warned __________ oily food after the operation.
| A．to eat not | B．eating not |
| C．not to eat | D．not eating |