--- _________?
---He was one of the most famous scientists in the world.
| A．what did Edison look like |
| B．Why was Edison so famous |
| C．How would you describe Edison |
| D．What were Edison’s strengths |
— ____ he be at home now ?
— No . he ____ not . He ____ be in his office . He often goes home from work at almost twelve .
| A．Can ; can ; must | B．Must ; need ; can | C．May ; must ; must | D．May ; need ; must |
“That VCD you bought ____ very expensive” . “Do you know ____ ? ”
| A．ought to be ; how much it cost | B．may be ; how much it costs |
| C．must be ; how much it cost | D．can be ; how much doesn''t it cost |
“I won''t go to school today , Dad ? ” “____ . ”
| A．You shall | B．You should | C．You must | D．You will |
She must have seen the blind man many times , ____ she ?
| A．haven''t | B．didn''t | C．hasn''t | D．hadn''t |
— We quarrelled with the tallest girl in your class about the broken table .
— How silly ! You ____ it to our headmaster .
| A．are going to tell | B．would have told |
| C．should have told | D．ought have told |