–Do you know where David is? I couldn’t find him anywhere.
– Well. He _____ have gone far — his glasses are still here.
| A．shouldn’t | B．mustn’t | C．can’t | D．wouldn’t |
Mary is a (n) __________ customer, so the waiter knows her likes and dislikes.
| A．usual | B．ordinary |
| C．common | D．regular |
The number of students applying for this position __________ 320.
| A．added | B．added up |
| C．added to | D．added up to |
We offered these students a summer course, aimed __________ improving their spoken English.
| A．to | B．in |
| C．at | D．for |
__________ to go to university, we must work hard.
| A．So as | B．in order |
| C．So that | D．in order that |
The explorers were told to __________ themselves with everything they would need for the voyage.
| A．associate | B．equip |
| C．treat | D．feed |