Question

3. When you rewrite the passage,I suggest you        the last sentence as it's rather difficult to understand (leave)

我建议你在重写这篇文章时删去最后一句话，因为它实在是太难理解了。

Answer 1

3. (should) leave out/leaving out suggest后既可跟that引起的宾语从句，that可省略，但从句谓语应用"(should+ ) 动词原形"结构；亦可后跟动名词作宾语，动名词前可以带逻辑主语，构成复合宾语。leave out为固定短语，意为"删除"。