He ______. It's a shame my mobile phone was power-off.
| A．ought to call me | B．could have called me |
| C．may be calling me | D．might call me |
The soldiers have to stand for hours without changing ________.
| A．position | B．state | C．situation | D．condition |
There are many islands ________ the southeast coast of China.
| A．to | B．on | C．in | D．off |
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 |