問題詳情

131. 

參考答案

答案：A
難度：簡單0.730159
統計：A(46),B(7),C(2),D(2),E(0)

用户評論

【新北小宇】評論

(a)應改為having

【pretest】評論

A narcotic is a substance that has a strong depressant effect on the human nervous system.