Dreye權威釋義|opt

opt

KK:[ɑpt] DJ:[ɒpt]

動變: 過去式:opted 過去分詞:opted 現在進行時:opting

權威釋義

單選題

With so many online frauds and con artists, we need to exercise extra __ when we purchase things or receive information through the Internet.

(A) optimism

(B) preference

(D) caution

對答案