It’s clear that a hard working student has a great interest in science. A. 不填; discoveredB

问题补充：

It’s clear that a hard working student has a great

interest in science.

A. 不填; discovered

B. 不填; developed

C. that; invented

D. that; developed

答案：

A. 不填; discovered

(答案→)B. 不填; developed

C. that; invented

D. that; developed

解析：It is clear that+从句是固定的句型，所以第一个空不用填任何词。Develop

表列：“发展”；discover表示“发现”；invent表示“发明”，只有develop符合题意。