Part III Vocabulary (20 minutes)
Directions: There are 30 incomplete sentences in this part. For each sentence there are four choices marked A, B, C and D. Choose the ONE answer that best completes the sentence. Then mark the corresponding letter on the Answer Sheet with a single line through the centre. 【題組】46. They are trying to ________ the waste discharged by the factory for profit.
(A)) expose
(B)) exhaust
(C)) exhibit
(D)) exploit