She pretended TV when her mother came in.
A. not to be watching
B. not watching
C. to not watch
D. having not watched
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(答案→)A. not to be watching
B. not watching
C. to not watch
D. having not watched
解析：考查pretend的用法：pretend后面接不定式，接to do表示假装要做…,接to be doing表示正在做，接to have done表示已经被做，句意：当妈妈进来时，她假装正在看电视。选A。