30．When you finish your work, don’t forget to put the tools back where they ________．
| A．are | B．will be | C．were | D．had been |
. The year 2003 ____ a wild spread of SARS, a disease people knew little about at that time.
| A．accompanied | B．followed | C．saw | D．caused |
The company turned a deaf ear to the workers’ _____ about their pay and working conditions.
| A．complaints | B．application | C．supplies | D．consequences |
Today’s world is changing rapidly, making _____ necessary for us to continue learning otherwise we can’t keep up with the time.
| A．us | B．it | C．this | D．one |
. ---- It’s a secret _____ you and me.
| A．beyond | B．within | C．between | D．among |
I think going swimming in my spare time, _____ I think is great fun and good exercise as well as a useful skill.
| A．which | B．as | C．that | D．what |