—Did you have any difficulty catching yesterday’s lecture?
—No. The professor spoke very clearly to make his speech easy _____.
| A．understood | B．understanding | C．to be understood | D．to understand |
Tom’s mother bought quite a lot of things online but spent only $20 _____.
| A．in order | B．in a word | C．in all | D．in conclusion |
Either you or I _____ going to attend the meeting in the afternoon.
| A．are | B．am | C．is | D．will |
Students should be encouraged to use _____ Internet as _____ resource.
| A．不填, a | B．不填, the | C．the, the | D．the, a |
His sister left home in 1998, and_______ ever since.
| A．had not been heard of | B．has not been heard of |
| C．had not heard of | D．has not heard of |
Sam _____ some knowledge of the computer just by watching others working on it.
| A．brought up | B．looked up | C．picked up | D．set up |