—Turn off the TV, Jack. ____your homework now?
—Mum, just ten more minutes, please.
| A．Should you be doing | B．Shouldn't you be doing |
| C．Couldn't you be doing | D．Will you be doing |
Garter Druse _____ his being selected for the important task to his courage，devotion and knowledge of the area.
| A．led | B．owed | C．devoted | D．contributed |
---Isn’t it a surprise that I happened to meet Francis Mathews at the Christmas Party last week?
---If my memory serves me correctly, you _____ each other for exactly two years.
| A．hadn’t seen | B．haven’t seen | C．didn’t see | D．don’t see |
We all held the view_____the book said was right.
| A．what that | B．that what | C．that | D．all which |
______ it have been the failure to pick up directions from the ground control that caused the air crash?
| A．Must | B．Could | C．Would | D．Should |
---What’s the matter with Christine?
---A letter from her parents in California_____an attack of home sickness.
| A．took off | B．set off | C．gave off | D．sent off |