Allwhocompletedthevoluntary__________onFridaywillreceiveacertificaterecognizingtheirparticipation.
A.train B.trained C.training D.trainable正确答案C
Allwhocompletedthevoluntary__________onFridaywillreceiveacertificaterecognizingtheirparticipation.
A.train B.trained C.training D.trainable正确答案C