—Haveyoufinishedthework?—Notyet,butnomatterhowharditis,...

问题详情：

—Have you finished the work?

—Not yet, but no matter how hard it is, we'll keep ________ until we make it.

A. failed    B. trying     C. tried     D. failing

【回答】

B

知识点：动词和动词短语

题型：选择题