若ab＜0，必有（ ）
A：a＞0，b＜0
B：a＜0，b＞0
C：a、b同号
D：a、b异号
Are you alone? I just want a ______ word with you.
下列情况对空气质量无影响的是（ ）
狼与羊之间的关系是（ ）
—I think drinking milk every morning is good ____ our health.
—Yes. I agree ____ you.
