No one but the experts in this field can _____ the difference between them.
| A．recognize | B．speak | C．spot | D．predict |
At first, we didn't know about Tom. But ____, we came to know that he was an honest boy.
| A．suddenly | B．luckily | C．gradually | D．slightly |
Almost all job applicants are determined to leave a good ___on a potential employer.
| A．impression | B．reputation | C．expression | D．experience |
She has good eyesight. She can see ____ the distant island in the sea.
| A．as long as | B．so far as | C．as much as | D．as far as |
It is obvious that water is to be _____to the development of life.
| A．gentle | B．fundamental | C．harmful | D．fierce |