A: You look very nice in your new dress today.

B: Oh, really? I               it when it was on sale.

A．buy

B．bought

C．have bought

D．will buy

若LM曲线平行于x轴，那么IS曲线向右移动可能产生的情况是（）。

A.产出效应最大

B.利率不变

C.产出增加

D.挤出效应逐渐增大