问题
PSAs are often run _____ free, and are ______ to educate people about health, safety, or any other problem that affects public welfare
A:for, mean
B:for, meant
C:of, to mean
D:in, meaning
B:for, meant
C:of, to mean
D:in, meaning
正确答案是：
同类题型
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Is that all—Yes. That’s all ______ I want to take.
She is on a special _____ to lose _____ weight[ ]
Our school put off ____ ___ the sports meeting because of the bad weather.