It’s clear__________ that a hard working student has___________ a great
interest in science.  
A．不填; discoveredB．不填; developed
C．that; inventedD．that; developed
B
It is clear that+從句是固定的句型，所以第一個空不用填任何詞。Develop
表列：“發(fā)展”；discover表示“發(fā)現(xiàn)”；invent表示“發(fā)明”，只有develop符合題意。
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