A: Hello! My name is Mike.

B: Hi! I am Lin Tao. ____?

A: I'm from Canada. Now I study in a middle school in Beijing.

B: Which school do you study in?

A: I study in No. 4 Middle School.

B: ____?

A: I go to school by subway. There are many people there every day.

B: ____ does it take you to get to school?

A: About thirty minutes.

B: ____?

A: Yes, I can speak Chinese now, but only a little.

B: How do you practice your Chinese?

A: I often practice ____ some Chinese stories. They are very helpful.

B: Oh, that's a good way to learn Chinese.

下列各句中，划线的成语使用恰当的一句是（    ）

1991年12月，随着苏联分崩离析，统治世界四十余年的国际秩序正在走向终结。各国决策者们突然发现，沿用近半个世纪的外交和国防基本战略，正在迅速变成一堆历史垃圾。这里的“历史垃圾”是指（    ）

乙醇在一定量的氧气中燃烧，测得反应前后各物质的质量如表所示

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下列判断正确的是（）