Let’s go to give the stranger a hand.________he’s got into some trouble.

Many dog owners treat their pets like human beings, ________ if they do not have children of their own.

A clean environment can help the city bid for the Olympics, which ________ will promote its economic development.

The two parties held the talk in a friendly ________ and reached an agreement.

(2013·成都部分高中高三质检)How can Margot ________ from her illness in this room when it is so dirty and dusty？It will only make her worse.