問題詳情

23. The pesticides kill the useful insects as well as the harmful ones. ______, theyalso leave poisonous substances in the environment we live in.
(A) Furthermore
(B) Therefore
(C) However
(D) While

參考答案

答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)