Choosing the right dictionary depends on ______ you want to use it for.
| A．what | B．why | C．how | D．Whether |
He must have been late for the conference yesterday, _______?
| A．didn’t he | B．hasn’t he |
| C．mustn’t he | D．wasn’t he |
He _______ more visits to his parents.He has been regretting not doing so since they passed away.
| A．should pay |
| B．would pay |
| C．should have paid |
| D．would have paid |
Some aspects of a pilot’s job _______ be boring,and pilots often _______ work at inconvenient hours.
| A．can; have to | B．may; have to |
| C．have to; may | D．ought to; must |
English is a language that many people around the world _______ not speak perfectly but at least _______ understand.
| A．might；could | B．will；must |
| C．would；might | D．can；may |
Something is wrong with the window; it _______ not open.
| A．shall | B．may |
| C．will | D．can |