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题型：单选题题类：常考题难易度：普通

四川省眉山市第一中学2019-2020学年高一上学期英语开学考试试卷

There are fewer and fewer tigers in the world. The situation will continue ________ humans stop killing them for fur and bones.

A、if B、since C、unless D、because

举一反三

Magic shows are entertaining ______ the audience does not discover how the tricks are done.

_______ you can sleep well, you will lose the ability to focus, plan and stay motivated after one or two nights.

In the United States and some other countries, it is the driver's responsibility to make sure that children under fourteen do not ride in the front seat they are wearing a seat belt of some kind.

We can choose to be happy if we want, ______ we can look at everything in a positive way.

A man can fail many times, but he isn't a failure _______ he begins to blame somebody else.

如果可能的话, 我们将参加一些社会活动, 以便于我们更多地了解这个社会。(if状语从句的省略)

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