All who completed the voluntary __________ on Friday will receive a certificate recognizing their participation.

2023-05-26

A.train
B.trained
C.training
D.trainable

参考答案:C

空格为被形容词“voluntary”修饰的名词的位置,因此A和C为正确答案的备选项。句子要求表示“志愿培训”旬意才自然,因此答案为C。

相关推荐