填空题

Life is a roller coaster, you have your ups and downs __________(只要不掉下来).

【参考答案】

unless you fall off

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热门试题

填空题

Her __________ (幼稚的回答) embarrassed everyone.

填空题

Mankind is growing increasingly interdependent and an International Chemical Society must. extend the benefits of its science to all the people of the world.