别为明天的考试焦虑，你已经准备得很充分了。

Don't ___fret about tomorrow's exam; you're well prepared.

海浪不断拍打岩石，渐渐将其侵蚀。

The waves ___erode the rocks over time.

吉他手的手指在琴弦与品丝之间快速移动。

The guitarist's fingers moved quickly between the strings and the ___frets.