单选题 While he was not dumber than an ox, he was not any smarter; so most of his classmates were lenient and helped him along.
【正确答案】 B
【答案解析】lenient仁慈的,宽大的;helpful有帮助的,有益的;merciful仁慈的,慈悲的;enthusiastic热心的,热情的;intelligent聪明的。