_____ the early flight, we ordered a taxi in advance and got up early．
| A．Catching | B．Caught |
| C．Catch | D．To catch |
It is a spectacular __________ as the fireworks are set off and light up the who sky during the Spring Festival.
| A．look | B．view | C．scenery | D．sight |
Would you take my old TV in _______ for this camera?
| A．place | B．return | C．exchange | D．business |
The research showed beyond ________ that smoking contributes to heart diseases.
| A．wonder | B．doubt | C．problem | D．use |
The man is____ a serious nervous breakdown because he is unable to deal with pressure from daily life.
| A．at the edge of | B．on the edge of | C．on behalf of | D．on the top of |
I believed, though I could be mistaken,______ he liked me.
| A．that | B．what | C．which | D．where |