题目内容
Herge' is a famous_________. He invented Tintin—a cartoon hero in 1929.
A. musician B. scientist C. doctor D. artist
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Mike used to be a top student, but he______ behind since he lost himself in computer games.
A. fell B. has fallen
C. was D. has been
D
【解析】
试题句意：迈克过去是一名尖子生。但是自从他沉迷于电脑游戏后，他落后了。根据since可知本题应该用现在完成时，fall behind落后，是个瞬间动作，当句中有since, for等表示时间段的时间状语时，要把瞬间动作改为持续动作，所以应该用be behind，故选D。