单项选择题：合成塔为更换催化剂而卸出“失活”的催化剂，应先（）。 A.将催化剂冷却后再卸出 B.

题型：阅读理解

How do you remember the way to your house? Where do dreams come from? It is your brain(大脑) that does these things. A British scientist showed that “sleep can improve one’s memory.” It’s not a dream for students to study when they sleep. In fact, your brains is working day and night. If you learn words before bed, a certain part of the brain may help you to remember the words while you sleep. What’s more, another scientist in the USA found that there was a “talent button(天才按钮)” in the human brain. It might make a person more talented.

There are more interesting things about the brain. Your brain uses less energy than a fridge light. Just two bananas can give the brain enough energy to work for a whole day. According to some scientists, yawning(打哈欠) keeps our brains “cool”, which makes us think quicker.

Here are some pieces of advice to keep a good brain:

Eat healthy food.

Get a lot of playtime or exercise.

Don’t drink or smoke.

Use your brain a lot.

小题1: A British scientist found out that ________ could improve our memories.

A．drink

B．dreams

C．sleep

D．bananas小题2: According to the passage, if we want to have a good brain, we should ________.

A．use our brains more

B．sleep fewer hours

C．work longer hours

D．remember fewer things小题3:Which of the following is TRUE according to the passage?

A．Our brains only work in the daytime.

B．Our brains need much energy every day.

C．Smoking can keep our brains healthy.

D．Getting exercise is good for our brains.

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题型：仿写题，造句

仿照例子，写句子。

1. Who is this? This is a boy.
2. Who __________ this? This is a __________.
3. _______________________? _______________________.
4. _______________________? _______________________.