I ______ my mind to study harder since I visited the Shanghai Supercomputer Centre.
A．a(chǎn)m making upB．have made upC．made upD．had made up
B

試題分析：句意:自從我參觀了上海超級(jí)電腦中心，我就下定決心更努力的學(xué)習(xí)。本句考查的是時(shí)態(tài)，因?yàn)榫渲杏衧ince，自從，它常和現(xiàn)在完成時(shí)連用，故本題應(yīng)該選B。make up one’s mind to do sth. 是一個(gè)句型，下定決心去做某事。A選項(xiàng)是現(xiàn)在進(jìn)行時(shí)；C選項(xiàng)是一般過去時(shí)；D選項(xiàng)是過去完成時(shí)。
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