Don't forget ______ the light when you leave the office.
| A．switching over | B．to turn on |
| C．to switch on | D．to switch off |
______ abroad for more than two years, he returned to his hometown.
| A．Studied | B．Studying |
| C．Having studied | D．To study |
——Shelooksveryhappy.Shehavepassedtheexam.
——Iguessso.It’snotdifficultafterall.
| A．should | B．could | C．must | D．might |
The fact that so many people still smoke in public places____ that we may need a nationwide campaign to raise awareness of the risks of smoking.
| A．suggest | B．suggests | C．suggested | D．suggesting |
MaybeifI_____ science,andnotliteraturethen,Iwouldbeabletogiveyoumore help.
| A．studied | B．wouldstudy | C．hadstudied | D．wasstudying |
I definitely appreciate ____ when I can walk away from my computer after a long day of typing and have pain-free arms!
| A．that | B．it | C．you | D．one |