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．