If their marketing plans succeed，they ________ their sales by 20 percent

Studying in aforeign country is a different _________ and you can learn a lot.

依次填入下列各句横线处的成语，最恰当的一组是（ ）①残疾人康复中心和托养中心项目的启动将使残疾人享受免费康复服务变得________。②金庸就是________天天写时评的报人，他以“左手写社评，右手写小说”而闻名于世。③这款智能手表将带有更多功能，也将带给大家更多的惊喜，大家都在________。

The world ______ Things never stay thesame

We teenagers shouldn’t be impatient _____ our own problems. _____ they are solved, we can never give up.