______________ about wild plants that they decided to make a trip to Madagascar for further research.
| A．So curious the couple were | B．So curious were the couple |
| C．How curious the couple were | D．The couple were such curious |
Every evening after dinner, if not from work, I will spend some time walking my dog.
| A．being tired | B．tiring | C．tired | D．to be tired |
Across North China in the world, namely the Great Wall.
| A．the longest wall runs | B．runs the longest wall |
| C．does run the longest | D．does the longest wall run |
Under no circumstances _______ the difficulties when they were on an expedition to the Antarctic．
| A．they gave way to | B．did they give way to |
| C．they had given way to | D．had they given way to |
Only when he returned______ the truth.
| A．he found out | B．did he find out | C．he finds out | D．does he find out |
In the south of the city ______ two railway lines.
| A．is | B．are | C．have | D．has |
— Did you know any French before you arrived in Washington?
— Never ____ it, actually.
| A．had I learned | B．have I learned | C．I learned | D．would I learn |
So much of interest _______ that most visitors simply run out of time before seeing it all.
| A．offers Beijing | B．Beijing offers | C．does Beijing offer | D．Beijing does offer |
We arrived at a farmhouse, in front of ______.
| A．it sat a small | B．which a small boy sat there |
| C．which sat a small boy | D．it was a small boy |
Wang Lin failed to be admitted by Hong Kong University last year, and only then _______ the importance of English.
| A．he finally realized | B．he had realized |
| C．did he realize | D．had he realized |