Some people argue that using _____ nature to meet our own needs may spell disaster, unless we start to look around and understand how ______ clean environment benefits us all.
| A．/; a | B．the; / |
| C．the; a | D．a; a |
Believe it or not, I’m sure that is _____ people call the six sense．
| A．when | B．what | C．which | D．why |
Mr．Green asked the naughty boy to be away from her window, _____ she would call his parents．
| A．and | B．so | C．then | D．otherwise |
Jack, you’d better make sure _____ the exact time of the train before setting out．
| A．with | B．of | C．that | D．for |
．It’s disappointing that no one could _________ a good idea to help us out of trouble．
| A．come off it | B．come up | C．come up with | D．come about |
In fact, the house as well as his two cars ______ him all the money he earned during the 20 years．
| A．has been cost | B．have cost | C．has cost | D．have been cost |