when he was ___,he went down to the small river behind the factor_英语解答

when he was ___,he went down to the small river behind the factory and tries to catch it .
A free B busy C ill D right

人气：483 ℃　时间：2020-01-17 21:54:57

解答

A free,为什么呢？当他自由空闲的时候。