I hope all China scholars can help me to answer. ...

Which of the following sentences is correct (see idiom) A. Facing the teacher's eager eyes, he finally felt (cornered) and had to admit the fact of copying homework. On the stage, the actors perform their tasks vividly with exquisite skills. (Vivid) C. Any great man is actually (insignificant) in front of nature, and people must keep awe of nature. The teacher also drew a circle of small things on our homework and corrected it seriously.

Since last autumn, the southwest of China has suffered from a rare drought, and about 6 million people have difficulty drinking water. With the continuous development of love, the degree of disaster will further deteriorate. Space experts have written a series of improvement reports on the basis of studying and investigating the launching of rockets under water. C In recent clinical follow-up, it was found that SAIIS virus not only damages the respiratory system, but also damages the heart. The U.S. government says it wants to ensure the stability of the Taiwan Province Strait, but whether it is a verbal commitment or a decisive measure, the media's views are negative. explain the cause (of)