14．In a sports team each player has a clear role, and there are few___when members are uncertain of their roles.
| A．occasions | B．positions | C．chances | D．Situations |
The doctor is skilled at treating heart trouble and never accepts any gift from his patients, so he has a very good __________.
| A．expectation | B．reputation |
| C．contribution | D．civilization |
_________ he met with the difficulty did he realize the importance of our help.
| A．Even though | B．Never until |
| C．Only before | D．Ever since |
Eating too much fat can __________ to heart disease and high blood pressure.
| A．devote | B．attend |
| C．contribute | D．turn |
Due to the unreasonable individual income __________，the gap between the rich and poor has become an outstanding issue.
| A．contribution | B．association |
| C．accommodation | D．distribution |
He contributed an article __________ China Daily.
| A．for | B．about | C．on | D．to |