We feel __________ our duty to make our country a better place.
| A．it | B．this |
| C．that | D．one |
At first, our company was very small, but after purchasing some smaller ones, it soon __________ into a large one.
| A．lengthened | B．extended |
| C．stretched | D．expanded |
The shoes are __________ than I expected.
| A．far expensive | B．far too expensive |
| C．far much expensive | D．far more expensive |
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 |