Having lived in China for 8 years, Helen has a good ______ of both English and Chinese．
| A．program | B．guidance | C．command | D．ability |
Maybe if I______science, and not literature then, I would be able to give you more help.
| A．studied | B．would study |
| C．had studied | D．was studying |
If there be a global nuclear war， life on the earth as we know it____ end forever.
| A．will； will | B．should； would |
| C．were to； will | D．is to； would |
It is a great honor to be invited to the evening party, thus _________ me to feast my eyes on your excellent performance.
| A．to allow | B．to have allowed |
| C．allows | D．allowing |
—How long would you like me to heat the oil?
—Heat it till it ________ to smoke.
| A．would start | B．starts |
| C．will start | D．start |
With the bridge ________next year, it will be easier to come to and go from the village.
| A．to build | B．to be built | C．built | D．being built |