Even if the treatment ________, there is still no magic pill for patients in the late stages of AIDs.
| A．does | B．uses | C．works | D．helps |
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 |