“作证”造句
除非撤销对她的谋杀指控，否则她拒绝
作证。
She refused to testify, unless the murder charge against her was dropped.
机舱人员一直在为M1空难调查
作证。
Cabin crew have been giving evidence at the M1 aircrash enquiry.
他们已经在华盛顿的大陪审团前
作证。
They have already given evidence before a grand jury in Washington.