----I
usually go there by train.
----Why not _________by boat for a change?
| A．to try going | B．trying to go | C．to try and go | D．try going |
An American scientist reported an unexpected and __________ discovery.
| A．astonishing | B．astonished |
| C．astonish | D．astonishment |
In the experiments, the scientists found that water __________ at 100℃.
| A．boils | B．boil |
| C．has boiled | D．had boiled |
I am sure your parents are proud __________ you.
| A．of | B．in |
| C．up | D．to |
—Are you used to __________ in the north with the old couples?
—Yes, I am glad to find out that coal is used __________ electricity for home use.
| A．live; to produce | B．living; to produce |
| C．to live; produce | D．living; producing |
__________ be late for the first class, Bill took a taxi instead of riding to school that morning.
| A．In order not to | B．So as not to |
| C．In order to not | D．So as to not |