阅读下面短文,用括号内所给动词的适当形式填空,必要时可加助动词或情态动词。

     How can we practic e our spoken English? The first important thing  is to believe yourself．You should always be full of confidence, or you will never be able to improve your English．

     You should often    1     (encourage) yourself "Come on, don't be afraid!" Maybe you are afraid of   2       (lose) face, but there's no need      3   (worry) about anything．You must always be active in practice．

You must know that the main way to study English is to make other people   4  (understand) ourselves．

专家选择时应注意专家应来自与预测项目有关的各个方面，互相之间最好互不相识，有较好的（）。