The Great Wall travel _______deep valleys, ________deserts and ________mountains.
| A．over, across, through | B．through, over, across |
| C．across, through, over | D．through, across, over |
Since David ______ downloaded a virus into his computer, he can not open the file now.
| A．readily | B．accidentally | C． horribly | D．irregularly |
---How often do you eat out?
---______, but usually once a week.
| A．Have no idea | B．As usual | C．It depends | D．Generally speaking |
--Have the police found the parents of the baby found by the road?
---Not yet. His identity ______.
| A．would be found out | B．has been found out |
| C．is being found out | D．had been found out |
---Mr. Smith, ______ he have all these letters typed for you right away?
---He ______. They should be ready by 10 o’clock this morning.
| A．will; must | B．shall; has to | C．need; will | D．would; ought to |
I won’t give you such help ______ you tell me the truth. It’s beyond my ability.
| A．when | B．since | C．if | D．even if |