一道初三英语题（改写句子）

We (have)to talk more loudly (because)of noise pollution.

We __need___ to talk more loudly __because____ of noise pollution.

Noise pollution makes us talk more loudly.(改为主动句）
We __have___ to talk more loudly ___because___ of noise pollution.
译，噪声污染使我们要更大声的说话。=由于噪声污染，我们要更大声的说话。

have ... because

have ... because

have because