英语翻译这把刀是专门用来切水果的（动名词作借此宾语）女主持人的话被掌声淹没了（drown out）他在书桌前坐下,开始做作业（seat oneself）

This knife is specially for cutting the fruits.
The hostess's voice was drowned out by the applause.
He seated himself on the desk and started to do the homework.

The knife is specially used for cutting fruits.
The hostess's words were drown out by the applause
.
He seated himself before the desk and started to do homework.

This knife is specially for cutting fruits.The hostess's words were drown out by the applause.He seated himself before the desk and bagan to do homework.

1 This knife is specially used to cut fruits
2 The hostess was downed in the applaud of the audience.
3 He sat himself before the desk and started to do homework.