Then I usually lay there just the ceiling, thinking about everything that could go wrong.

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(答案→)A. staring at
B. glancing at
C. watching at
D. glaring at
解析：句意：那时的我经常只是躺着凝望天花板，心里想着所有事情可能都会变糟。staring at凝视；glancing at瞥见；watching 看； glaring at瞪着。所以选A。
考点: 考查动词短语的用法。