Section I Vocabulary (10 points)

Directions：There are 20 incomplete sentences in this section．For each sentence there are four choices marked A，B，C，and D．Choose the ONE answer that best completes the sentence．Then blacken the corresponding letter on the ANSWER SHEET with a pencil．

1．His wife has been _______a lot of pressure on him to change his job．

A．taking                        B．exerting

C．giving                        D．pushing

2．It is estimated that，currently, about 50，000 species become _____every year．

A．extinct                        B．instinct

C．distinct                        D．intense

3．John says that his present job does not provide him with enough ______for his organizing ability．

      A．scope                         B．space

      C．capacity                       D．range

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