The population problem may be ___ one of the world today.
| A．the most |
| B．most difficult |
| C．the greatest |
| D．more interesting |
It was in the lab __________was in the charge of Professor Smith __________they carried out the experiment.
| A．where；that | B．which；where | C．that；where | D．which；that |
—Bad luck. My computer doesn’t work.
—Why not turn to John? No one can match him in our class when it __________repairing computers.
| A．comes to | B．leads to | C．contributes to | D．attends to |
Hellen doesn’t know how much I spent in repairing the house. If she ever found out, I’m sure she me.
| A．will never forgive | B．would never forgive |
| C．does not forgive | D．never forgives |
When Peter speaks in public, he always has difficulty ______ the right things to say.
| A．thinking of | B．to think of | C．thought of | D．think of |
To avoid on how to use the word, you’d better refer to a dictionary.
| A．to get confused | B．getting confused |
| C．to get confusing | D．getting confusing |