46
(A) Additionally
(B) However
(C) By contrast
(D) Thankfully

About forty percent40％ of all email traffic in the United States is spam垃圾郵件, and this figure數字 is climbing rapidly迅猛.

Spam垃圾郵件 is usually defined解釋, 給（尤指單詞）下定義 as unsolicited未經要求、不請自來, mass commercial email.

It is often 44 advertisements for pornographic淫穢作品；色情 websites, drugs, or surgery that can enhance your sex life.

Within another year or so, industry experts 45 , half of all email messages will be unsolicited未經要求、不請自來.

The flood淹沒, 洪水 of email marketing causes headaches for email users.

46 , it costs corporations公司, 大公司 billions of dollars and reduces employee productivity生產率.

(A) additionally中文:另外