为…作证

1. 证明(为---作证)：2: He managed to avert suspicion.他设法避嫌. | 3: bear testimony to:证明(为---作证) | 4: tax rebate:退税

2. 为...作证：bear testimony against 抗议 | bear testimony to 为...作证 | call sb. in testimony 传某人作证