单选题 The neighbors seemed really glad ______ you stopped by the other day.
A. for B. to
C. if D. that

【正确答案】 D
【答案解析】[解析] 空格前的形容词glad并没有直接修饰名词，而是用做＜主语+be glad that(对……感到很高兴)＞的形式。
词汇：stop by顺便拜访