Water always_______ steam when boiled.

Water always_______ steam when boiled.
A、gives out
B、gives up
C、gives off
D、gives in
【正确答案】：C
【题目解析】：give out 分发；give up 放弃 give off 发出；give in 屈服；句意：水烧开时总是放出蒸汽。give off 放出，发出，符合题意。