I'm tired out. I all afternoon and I don't seem to have finished anything.
| A．shopped | B．have shopped |
| C．had shopped | D．have been shopping |
A completely new situation is likely to when the new law comes into effect.
| A．arise | B．rise | C．raise | D．rose |
The computer, help we human beings have stepped into the information age, should be regarded as one of the most important inventions in the 20th century.
| A．which | B．whose | C．with its | D．with whose |
The little boy, out of curiosity, _______ the toy to see how it worked, but couldn’t put it together.
| A．took apart | B．broken down | C．burst into | D．knocked off |
–Do you need any help, Lucy?
--Yes. The job is I could do myself.
| A．less than | B．more than | C．no more than | D．not more than |
These flowers should not be watered too ______, once _____.
| A．long; every other day | B．often; every fourth day |
| C．soon; every two days | D．frequently; each five days |