The weather turned out to be fine yesterday. I ____ the trouble to take my umbrella with me. [      ]

A. could have taken  

B. should have taken

C. couldn't have taken  

D. needn't have taken

所谓“绿色涂料”是指节能、（）的涂料。

A.价格低

B.耗能低

C.含绿色素

D.低污染