【题目】In order not to be heard, she pointed her finger upwards to ____ that someone was moving about upstairs.
A. whisper B. signal C. declare D. complain
在线课程【答案】B
【解析】试题分析：句意：为了能够被听到，她手指向上指，示意有人正在楼上走动。A项“低声说，私语”；B项“发信号，（用手势）示意”；C项“（正式）宣称”；D项“抱怨”。故选B项。