— __________.
A：It's my pleasure
B：It doesn't matter
C：Yes, let's go
D：I agree with you
—Which is more useful, reading or writing?
—I think _______ of them are useful.
货币之所以能度量一切商品的价值是因为（ ）
如何确定个人成长目标？
某地一天的最高气温是12℃，最低气温是﹣2℃，则该地这天的温差是（ ）
