—Have you met Mr.Li?
—Yes.When I arrived，he________for Shanghai to attend a national conference.
| A．just left |
| B．had just left |
| C．just leaves |
| D．was just leaving |
There are many pine trees on ___ of the street.
| A．every side | B．neither side | C．both side | D．either side |
I don't think this question is worthy ____.
| A．to consider | B．to be considered | C．considering | D．of considering |
There were three ____ eggs in the basket.
| A．dozen | B．dozens | C．dozened of | D．dozens of |
The earth is 49 times ___the moon.
| A．as bigger as | B．so big as | C．the size of | D．of the size of |
The medicine has begun to ___
| A．have its work | B．take its work | C．do its work | D．show its work |