1.你应该全神贯注于你的学习
You should concentrate on your studies.
2.玉树发生了很严重的地震,结果很多人丧失了生命
The earthquake broken out (或happened) in Yushu took many people's lives.
3.谁会为这顿饭付款?
Who will pay for this meal/dinner?
4.他冒了很大的风险,但他的风险得到了回报
He took great risks, but they were paid back.
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