—Ihadtriedmanytimes,butstillfailedintheexperiment. —Don...

问题详情：

—I had tried many times, but still failed in the experiment.

  —Don't be discoursed,_____ and you will surely meet success.

ng a little effort  e being a little effort you have a bit of effort  D.A bit more effort

【回答】

D

知识点：固定句型

题型：选择题