给某人做证 call sb in evidence

用来做证据或理由 quote

如果他在听证会上做证 Now,if he testifies at that hearing

取财物或做凭证的单据 a certificate for drawing money

保证做某事 guarantee to do sth ; bind oneself to do sth ; promise to do sth

保证做到 make sure ; make sure/certain

做伪证 perjure ; perjury

正在做CE认证 CE certification is being done

做出保证 assurance