_______about wild plants that they decided 
to make a trip to Madagascar for further research.
| A．So curious the couple was | B．So curious were the couple |
| C．How curious the couple were | D．The couple was such curious |
It is much easier to talk about social change than to .
| A．bring it on | B．bring it about | C．bring it up | D．bring it out |
This is a story completely by him, so don’t rust him.
| A．discovered | B．invented | C．found | D．known |
Historical experience can as a most important source of information.
| A．serve | B．use | C．regard | D．prove |
Have a good rest, you need to your energy for the tennis match this afternoon.
| A．have | B．save | C．hold | D．get |
. It was so noisy out side that he couldn’t down to read.
| A．settle | B．put | C．sit | D．lie |