I was too sad to my tears when I heard the sad news.A. keep upB. keep outC. keep backD. ke

问题补充：

I was too sad to my tears when I heard the sad news.

A. keep up

B. keep out

C. keep back

D. keep away

答案：

A. keep up

B. keep out

C. keep back

D. keep away

解析：题意：当我听到那个悲伤的消息时，我难过的泪水止不住地往下流。keep up 保持；keep out 挡住，使进不去；keep back 阻止；keep away 远离。