The old professor told us that every part of the materials should be made use of _____ the station．
| A．building | B．to build | C．build | D．being built |
He didn't makeclear when and where the sports meet would be held.
| A．this | B．it | C．that | D．one |
Being able to speak another language fluently is a greatwhen you are looking for a job.
| A．advantage | B．chance | C．assistant | D．importance |
, he dialed 999.
| A．Seen the house on fire | B．To see the house on fire |
| C．Being seen the house on fire | D．Seeing the house on fire |
Weon it for several hours but we haven't yet reached any conclusion.
| A．are working | B．work | C．have been worked | D．have been working |
---Will you help me with this mathematical problem?.
---Sure. Let me see.
| A．It’s your turn | B．Go on | C．I’m stuck | D．See what I mean? |