Swings moved gently（ ）in the breeze, as if rocked by some unseen hand.
A、sooner or later
B、back and forth
C、more or less
D、thick and thin
【正确答案】：B
【题目解析】：本题考查副词短语辨析。sooner or later：迟早，早晚。back and forth：反复地，来回地。more or less：或多或少。thick and thin：在任何情况下。语境是“秋千摆动”，所以是B选项“反复地”最符合题意。
句意：秋千在微风中轻轻地来回摆动，仿佛被一只看不见的手摇晃着。
