When you finish reading the book, you will have ________ better understanding of ______ life.
| A．a; / | B．the; a | C．/; the | D．a; the |
Jumping out of ________ airplane at ten thousand feet is quite ________ exciting experience.
| A．an; / | B．/; an | C．an; an | D．the; an |
—Why didn’t you answer my phone at 10 am?
—I for my decayed tooth in the clinic.
| A．treated | B．was treated | C．have been treated | D．was being treated |
—Which of those electronic dictionaries do you like most?
— . They are both expensive and of little use.
| A．Both | B．None | C．Neither | D．All |
no modern technology, the Egyptians had to move each stone by hand.
| A．It being | B．There being | C．There was | D．Being |
The accident that happened at an oilfield the southeast coast of the USA has caused great damage to the environment.
| A．away | B．from | C．beyond | D．off |