The year 1949 ________ the birth of a new country—the People’s Republic of China.
| A．found | B．watched |
| C．noticed | D．saw |
Shortly after suffering from a massive earthquake and ________to ruins，the city took on a new look.
| A．reducing | B．reduced |
| C．being reduced | D．having reduced |
________ basic firstaid techniques will help you respond quickly to emergencies.
| A．Known | B．Having known |
| C．Knowing | D．Being known |
________ how others react to the book you have just read creates an added pleasure.
| A．Hearing | B．Hear |
| C．Having heard | D．To be hearing |
The engine just won’t start.Something seems________wrong with it.
| A．to go | B．to have gone |
| C．going | D．having gone |
When we saw the road________with snow，we decided to spend the holiday at home.
| A．block | B．to block |
| C．blocking | D．blocked |