Finding information in today’s world is easy. The _____ is how you can tell if the information you get is useful or not.
| A．challenge | B．competition |
| C．ability | D．knowledge |
It is generally considered unwise to give a child _______ he or she wants.
| A．however | B．whatever | C．whichever | D．whenever |
I ___________come yesterday, but I couldn’t.
| A．was to have | B．must | C．ought | D．have to |
If I ____________out of my ink, I would have finished writing the paper.
| A．didn’t run | B．shouldn’t run | C．haven’t run | D．hadn’t run |
The professor gave orders that the test ___________before 5:30.
| A．be finished | B．will finish | C．will be finished | D．shall be finished |
The possibility of a way out of the impasse(僵局) had never ____________ to anyone.
| A．happened | B．occurred | C．appeared | D．flashed |