Tina _____ have known the truth, or she would have told us.
| A．mustn't | B．shouldn't | C．can't | D．needn't |
Studying Tom’s menu, I found that many of the items are similar to ________ of McDonald’s.
| A．those | B．ones | C．any | D．all |
People who do not smoke have less ______of suffering from lung cancer than those who do so.
| A．potential | B．pattern |
| C．preference | D．prejudice |
This factory produced much dirty water, which resulted in a wide _______ of environmental problems.
| A．branch | B．range |
| C．species | D．wave |
Please tell me how the accident _______. I am still in the dark.
| A．came up | B．came out |
| C．came to | D．came about |
It is______ of him to set his aim high but do little, so he is always leaving things undone.
| A．specific | B．typical |
| C．flexible | D．widespread |