From the look on his face I knew that he must have been threatened by someone.A. vividB.

问题补充：

From the look on his face, I knew that he must have been threatened by someone.

A. vivid

B. horrible

C. curious

D. terrified

答案：

A. vivid

B. horrible

C. curious

(答案→)D. terrified

解析：考查形容词辨析。A生动的；B恐怖的；C好奇的；D害怕的。句意：从他那害怕的表情，我知道他肯定是受了某人的威胁。根据句意所以选D。

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