Laboratory　work　is　your　chance　to　learn　science　firsthand.　It　can　be　fun　but　you　must　be　careful　to　prevent　injury.　Listen　closely　when　your　teacher　reads　and　explains　the　rules　before　your　first　lab　lesson.

    LABORATORYRULES

    Throughout　the　lesson

    ·Do　not　enter　the　science　lab　without　the　teacher’s　permission.·No　food　or　drinks　are　to　be　alowed　in　the　science　lab.

    Before　the　Experiment

    ·Read　al　instructions　carefuly　before　every　experiment.

    ·Prepare　al　apparatus（仪器）and　arrange　them　so　that　you　wil　not　knock　them　over　while　doing　the　experiment.

    During　the　Experiment

    ·If　you　are　unsure　of　how　to　use　any　apparatus　or　how　to　operate,　ask　your　teacher　for　help.·Never　smel　or　taste　chemicals　unless　your　teacher　gives　permission.

    After　the　Experiment

    ·Wash　al　apparatus　after　use　and　return　them　to　the　places　where　they　were.

    ·Throw　waste　materials　in　proper　waste　baskets.　　　　First　Aid　　　　

    ·Report　al　accidents　to　your　teacher　immediately.

    ·If　you　spil（ 溅 出 ）any　chemicals　onto　your　body　or　clothing,　wash　with　plenty　of　water　and　report　to　your　teacher.

   1.　Your　teacher　wil　probably　tel　you　the　rules　above　_____　the　first　lab　lesson.

    A.　before　　　　　B.　since　　　　C.　during　　　　D.　after

2.　Before　every　experiment,　you　should　_____.

    A.　taste　the　chemicals　first

    B.　clean　al　the　apparatus

    C.　read　al　instructions　carefuly

    D.　report　al　the　accidents　to　the　teacher

  3.　When　you　are　not　sure　how　to　use　al　apparatus,　_____.

    A.　try　them　on　your　own

    B.　read　the　rules　carefuly

    C.　ask　your　teacher　for　help

    d.　put　them　back

 4.　It　is　clear　that　you　can　_____.

    A.　 bring　food　into　the　lab

    B.　enter　the　lab　anytime

    C.　smel　chemicals　as　you　like

    D.　learn　science　directly　in　the　lab

    5.　If　you　get　chemicals　on　the　clothing,　you　can　find　ways　to　solve　it　in　the　part　_____.

    A.　Before　the　Experiment

    B.　First　Aid

    C.　During　the　Experiment

    D.　After　the　Experiment

What are you going to do if you are in a burning house？ How will you escape？ Do you know how to save yourself？ Please read the following passage.

   Escaping a fire is a serious matter. Knowing what to do during a fire can save you life. It is important to know the ways you can use and show them to everyone in the family， such as stairways and fire escapes， but not lifts.

　　From the lower floors of the buildings， escaping through windows is possible， learn the best way of leaving by windows with the least chance of serious injury.

　　The second floor window is usually not very high from the ground. An average person， hanging by the finger-tips will have a drop of about six feet to the ground. It is about the height of an average man. Of course， it is safer to jump a short way than to stay in a burning building.

　　Windows are also useful when you are waiting for help. Be sure to keep the door closed. Or smoke and fire may be drawn into the room. Keep your head low at the window to be sure you get fresh air rather than smoke that may leaked（渗） into the room.

　　On a second or third floor， the best windows for escape are those that open onto a roof. From the roof a person can drop to the ground more safely. Dropping onto cement（水泥） might end in injury. Bushes（灌木丛） and grass can help to break a fall.

1.It is important to _______.

A. put out the fire in the burning house     B. know the ways to escape the fire

C. jump off a burning house                       D. keep the door closed

2.It is possible to escape through the windows _______.

A. if there are some bushes on the ground        

B. if you are strong enough

C. if you live on a lower floor                  

D. If you have a long rope

3.Which of the following escaping way is NOT right？ _______.

A. You can escape though stairways.       

B. You can choose fire escapes.

C. Escape from the windows that open onto a roof.     

D. Use a lift to come down at once.

4.Open the window so that _______ if the building is on fire.

A. you can get fresh air                           B. you can call for help

C. you can easily jump off                        D. you can be seen first

5.The best title of the passage is _______.

A. Escaping from the Windows       

B. Save Yourself in the Burning House

C. Knowledge on Fire                    

D. Waiting for Help

完形填空 (共15小题；每小题1分，满分15分)
阅读下面短文，从每题所给的A、B、C、D四个选项中，选出最佳选项
What will you do to make sure you reach your goals? There are 1 main steps .
First, sit down and 　2 your dreams out. By writing them you will get a better idea of where you really want to go. Imagine yourself at the end of the year or maybe 3　 five years. What do you see? 4 do people see you? What are you doing? Are you 　5　?
Well, a dream is just that. It’s a vision (远见) of how you 　6　 yourself in the future. As long as you know the direction in which you want to go, you can begin 　7　 some goals.
8 come the goals. Goals are ‘wants’. So are dreams, but goals are more specific (具体的). If you want to be rich, tell how much 9 you need to be rich. If you want 　10 grades, tell what you mean by ‘good’. In fact, the more specific the goal is, the 　11　 it will be to get it. Give numbers and times. Don’t use words like ‘lots’ or ‘more’. 　12, I want a ‘B’ in each of my subjects.
Third are the objectives (目标). They tell 　13　 what you will do and when you will do it. When you think about what you will do, don’t use words like ‘　14　’ or ‘maybe’. Be sure your objectives can be measured (估量). Every day or every week you can ask, ‘Did I 　15　 this?’ and you can answer with either a yes or a no. Don’t leave room for ‘maybes’.

Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quickly. But computer injuries slowly.

　 You probably know how to ride a bike safely. Now learn to use a computer safely.

Your eyes

　 Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters from the screen. Remember to look away from it sometimes. This gives your eyes a rest.

　 When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on (反射) the screen. If the window is in front of you, the sun and the screen will both shine into your eyes.

Your hands and wrists (手腕)

　　Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules: 1) Rest your wrists on something. 2) Keep your elbows (肘部） at the same height as the keyboard. 3) Stop something and exercise your hands, wrists and fingers in a different way.

Your back

　　Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should all be in front of your eyes. Your forearms（前臂）, wrists, hands and the upper（上部） part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and necks.

　 Enjoy your computer, but use it safely.

1.A computer screen may injure your eyes if __________.

A．you sit 60 centimeters away

B．you remember to look away

C．your eyes are too close to it

D．the window is on your left or your right

2.Hand and wrist injuries are caused when you _________.

A．get plenty of exercise

B．move in the same way again and again

C．rest your wrists on something

D．keep your elbows as high as the keyboard

3.Your eyes and hands will be safe if __________.

A．you work near a window

B．you often take a rest from working

C．you use a keyboard for a long time

D．the window is behind you

4.It is good for your back and neck if you sit __________.

A．in the right way

B．for many hours

C．with the screen below your eyes

D．with your back leaning forward

5.What would be the best title for the passage?

A．How to protect your eyes

B．How to protect your hands and wrists

C．How to use a computer safely

D．How to protect your back