Information technology is taught in most schools，________ we have entered the information era.
A．so B．while
C．for D．still
It's really very dangerous.One more step，________ the baby will fall into the well.
A．or B．so C．but D．and
There is still much to discuss；________，we shall return to this topic at the next meeting.
A．yet B．therefore
C．otherwise D．however
Knowledge is the food of thought ________，as long as it is put in our brain，we will grow wiser.
A．but B．when C．then D．and
The number of the employees has grown from 1,000 to 1,200.This means it has risen ________ 20 percent.
A．at B．by C．to D．with
—What do you want to do ________ those old boxes?
—To put things in when I move to the new flat.
A．by B．for C．of D．with
