With the rise of modern munication tools, handwritten letters by emails.
A. will replace
B. have replaced
C. are replaced
D. are being replaced
网友回答
A. will replace
B. have replaced
C. are replaced
(答案→)D. are being replaced
解析：考查时态：句意：随着现代通讯工具的增加，手写信正被电子邮件代替。handwritten letters和replace是被动关系，而且这个动作是现在正在发生。用现在进行时的被动式。选D。