题目

A new function of China's official train ticket booking website _______ to boost buyers' chances of obtaining a ticket during the upcoming Spring Festival travel rush.A. will be expectedB. expectsC. has been expectedD. is expected

A new function of China's official train ticket booking website _______ to boost buyers' chances of obtaining a ticket during the upcoming Spring Festival travel rush.

A. will be expected

B. expects

C. has been expected

D. is expected

题目解答

答案

D. is expected

解析

本题考查动词的时态和语态的正确使用。解题关键在于：

  1. 判断主语与动词的关系：主语"A new function"与动词expect之间是被动关系，需用被动语态。
  2. 确定时间逻辑：句中未明确限定时间，但语境强调"新功能被预期用于未来春运购票"，需用一般现在时的被动语态表达预期动作。

选项分析

  • A. will be expected：表示将来被动，但句中未明确限定"将来"，且"预期"动作更接近当前时间。
  • B. expects：主动语态，与主语"功能"的逻辑关系不符（功能本身不会主动"预期"）。
  • C. has been expected：完成被动强调动作持续性，但句中强调当前状态的预期。
  • D. is expected：一般现在时被动，准确表达"被预期用于未来目的"的客观判断。

句法逻辑

空格后接动词不定式to boost...作目的状语，说明功能被预期的用途。被动语态is expected与主语功能形成正确逻辑关系。