_____ is known to us all, a skill can only be acquired through hard work.
| A．It | B．As | C．What | D．That |
SARS is an illness that can result in death unless left _____in time.
| A．to treat | B．treating | C．treated | D．treat |
It knowledge is power, ____Sir Francis Bacon wrote in 1579, ____perhaps creativity ca be described as the ability to use that power.
| A．what; and | B．as; then | C．which; and | D．that; then |
I think you must be mistaken about seeing him at the theatre; I’m sure he_____abroad all week.
| A．is | B．was | C．has been | D．had been |
—Have you nearly finished?
—____, we have just begun.
| A．Above all | B．After all |
| C．On the contrary | D．On the other hand |
—Hold the ladder for me!
—That’s_________.
| A．all | B．it | C．all right | D．complete |