With many cities in China dreadfully blanketed by thick haze, the environment problem is _____ Chinese people concern most nowadays.
| A．what | B．which | C．where | D．when |
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