He would rather ______ his mother the truth.
| A．not tell | B．not telling | C．not to tell | D．told |
There were three ___ eggs in the basket.
| A．dozen | B．dozens | C．dozens of | D．dozened 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 machine has begun to ___.
| A．have its work | B．take its work | C．do its work | D．show its work |
I regret ___ harder in the past two years.
| A．not having studied | B．having studied | C．having not studied | D．not being studied |
Had your father seen the doctor earlier, he ___.
| A．would have died | B．would not have died | C．would not die | D．has not died |