It was the largest experiment we had ever had; it _____ six hours.
| A．ended | B．finished | C．prolonged | D．lasted |
Nobody noticed the thief slip into the house because the lights happened to__________.
| A．put up | B．give in | C．be turned on | D．go out |
--- I have great difficulty figuring out the answer to this problem.
--- _____ my advice, you ____ less difficulty with such problems.
| A．If you had followed, would have had | B．If you followed, would have |
| C．If you had followed, would have | D．If you listen, will have |
As we all know, the Internet will let people have ______ to huge amounts of information from their own homes.
| A．entrance | B．way | C．means | D．access |
People like to shop in the supermarket because they are interested in the __________ of goods on offer and can buy whatever they want.
| A．price | B．variety | C．value | D．amount |
．She had a guilty________ about not telling the police what had actually happened.
| A．consciousness | B．conscience | C．consequence | D．confusion |