—I called you at 9 last night，but no one answered.
—Sorry，I ________ sleeping.I went to bed very early.
| A．need have been | B．would have been |
| C．must have been | D．should have been |
Although we met with many difficulties, we got back home __________.
| A．safely and sound | B．safe and soundly |
| C．safe and sound | D．safely and soundly |
Linda gave us a vivid __________ of her trip to Mount Lushan after her return.
| A．account | B．explanation |
| C．imagination | D．direction |
Ten years ago the population of our village was __________ that of theirs.
| A．as twice large as | B．twice as large as |
| C．twice as much as | D．as twice much as |
You should encourage him instead of __________ his dreams.
| A．pour cold water on | B．pouring cold water on |
| C．pour oil on the flames | D．pouring oil on the flames |
At the sight of the __________ snake, there appeared a __________ look on her face.
| A．terrifying； terrifying | B．terrified ； terrified |
| C．terrifying ； terrified | D．terrified ； terrifying |