单选题
When I took out my appointment book and busily ______ it, my client got the impression that I had a busy schedule.
【正确答案】
A
【答案解析】[解析] 动词词组辨析。根据句中的连词and判定，空格所填的动词词组与took out构成时间上顺序结构，也就是拿出my appointment book之后的动作应该是检查它。选项中，checked out意为“检验”，符合句意。故答案为A。