证人作证说她看到了事故。

The witness ___testified that she saw the accident.

她同意作证指控嫌疑人以换取豁免。

She agreed to ___testify against the suspect in exchange for immunity.

在审判期间，专家被传唤就法医证据作证。

During the trial, the expert was called to ___testify about the forensic evidence.