he did well he was never top of his class.A. Although B. ButC. Because D. Since

问题补充：

he did well, he was never top of his class.

A. Although

B. But

C. Because

D. Since

答案：

(答案→)A. Although

B. But

C. Because

D. Since

解析：句意：尽管他做的很好，他从来没有得过班级第一。A. Although“尽管…但是”；B. But“但是”； C. Because“因为”；D. Since“由于”。结合句意，故选A。