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题型：单选题题类：真题难易度：普通

Pandas are facing danger！The situation won't change humans stop killing.

A、unless B、though C、if D、after

举一反三

—What's your plan for the summer holidays?
—I'll go to Beijing _______ the school terms ends.

We can't go out for a walk _______ the bad weather.

There is no air________water on the moon.

It's almost eight years _______we saw each other last time.

Jimmy has no brothers ______________ sisters.

There are many trees on _________________ side of the road. They were planted several years ago.

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