What the teacher said in class set all the _____ a lot.

A.present students to think

B.students present thinking

C.present students thinking

D.students present to think

答案及解析： B

解析：

考查set的用法。Set+宾语+宾补（形容词、介词或v.-ing），意为“使处于某种状态”。句意“老师在班里说的话让所有在场的学生思考良久。”present“出席的，在场的”，作后置定语。故选B。