_____ unemployment and crime are high, it can be assumed that the latter is due to the former.
| A．Before | B．Where | C．Unless | D．Until |
“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 |
____ keep it a little longer ? I want it very much .
| A．Able I to | B．Be able I to | C．Can I | D．Can I able to |