Swings moved gently（ ）in the breeze, as if rocked by some unseen

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。