—What were you doing when she dropped in?
—I for a while and_________ some reading.
| A．was playing; was going to do | B．played; did |
| C．had played; was going to do | D．had played; did |
The ship sailed _____ Xiamen _____ 30 miles an hour.
| A．for, at | B．to, at | C．to, by | D．for, by |
It’s quite warm _____ January.
| A．in | B．for | C．on | D．at |
The key _____ four modernizations lies _____ the science and education.
| A．to, on | B．of, on | C．to, in | D．of, in |
What one thinks and feels is mainly _____ traditions, habits and education.
| A．because of | B．due to | C．since | D．through |
Get in touch with them, for they will be anxious _____ news of your arrival.
| A．at | B．for | C．about | D．to |