Change the wrong sentence, ask for the wrong cause

One of the following sentences that is not wrong is
[ ]
A. In recent years, the quality problems of domestic milk powder have been frequent, objectively promoting the dependence of Chinese consumers on "foreign milk powder", making "foreign milk powder" particularly favored.
B. Looking at the towering Incense Burner Peak surrounded by white clouds and the unstoppable waterfall of Lushan Mountain, all visitors feel the magnificence and power of nature.
C. The relevant state departments organized nuclear safety experts to conduct safety inspections on nuclear power units under construction, nuclear power units to be built, and nuclear fuel cycle facilities in nine months.
D. The reason why middle school students liked online novels was that most of these works were rich in thoughts and emotions, the characters were vivid, and the narrative was free and lively.

Answer 1

Why hasn't he come back yet?

Cause: The sentence structure is chaotic, and the subject and the predicates are inconsistent. In the original sentence, the subject was "he" but the predicates were "not back yet", causing the sentence structure to be chaotic. It should read:

Why hadn't he come back yet?

The revised sentence structure was clearer, the subject was clear, and the predicates were correct.