问题
选择题
To his surprise, Jack found his son ______ as Santa Claus on Christmas Eve.
A．dressed
B．dressing
C．to dress
D．being dressed
答案
A
题目分析：句意：使他惊讶的是，在圣诞前夜他儿子装扮成圣诞老人。这里使用find+宾语+宾语补足语的结构，需要非谓语做宾语补足语，因为be dressed as“装扮成”，所以用过去分词做宾语补足语。选A。