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People’s appearance (外貌) depends on things called genes (基因). Genes are found in the cells (細胞) of people’s bodies, and they are passed on from parents to children. Here are some facts about eyes.

Many Europeans and Americans can have blue, green or brown eyes. But a brown-eyed person, for example, may also carry genes for another colour in his body. So two brown-eyed or green-eyed parents may not have a child with the same colour eyes. If a child’s father and mother both have brown eyes, their child will probably also have brown eyes, but this is not certain.

If one parent has blue eyes and one has brown eyes, their child may have either blue eyes or brown eyes, but most will probably have brown eyes. The gene for blue eyes is recessive (隱性的) and the gene for brown eyes is dominant (顯性的). This means that if a child gets a gene for blue eyes and also a gene for brown eyes from one of his parents, brown will win, and the child’s eyes will be brown, not blue.

1.Children look like their parents because they get genes from their parents.

2.A brown-eyed child only carries the gene for brown eyes in his body.

3.If a child has brown eyes, one of his parents may have other colour eyes.

4.If a child’s father and mother both have green eyes, the child’s eyes must be green.

5.If one parent has blue eyes and one has brown eyes, their child mostly has brown eyes.

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科目：初中英語 來源：江蘇省南通市2019-2020學年七年級上學期期末英語試卷 題型：閱讀單選

Playgrounds are great places to have fun. But you need to have fun without getting hurt（傷害）. Here are some rules you should know before you go to a playground.

Getting ready to play

Wear shoes to keep your feet safe Don't go barefoot(赤腳地)。

Don't play on the equipment(設備)with water on it .Wet equipment can be slippery(滑的）and can make you fall.

Don't play on broken(環的、破損的)equipment. Tell an adult(大人) if any playground equipment is broken.

Slides(滑梯)

Go down the slide, one child at a time.

Don't go down the slide until the child in front of you gets to the ground and moves away from the slide. Never climb up the front of the slide. A child can slide down and hurt you.

Climbing

Climb stairs or steps slowly. Hold onto the handrails(扶手)。Use both hands when climbing.

Swinging

Sit down on the swings and slow down before getting off.

Be careful when you walk in front of a moving swing. You don't want to get hurt.

If something goes wrong

Knowing these rules can help keep you safe and prevent accidents, but sometimes things can still go wrong.If there's a problem or if someone gets hurt in the playground, ask an adult for help at once.

1.In order to keep your feet safe, you should when playing in a playground.

A.wear long socks B.wear shoes C.wear glasses D.wear trousers

2.If you play on the equipment with water on it, .

A.you may slip and fall B.you may get a cut

C.others may hit you D.the equipment may hit you

3.You can go down the slide when .

A.the child in front of you gets to the ground and moves away from the slide

B.there are many people in front of you

C.a child is climbing up the front of the slide

D.a child is going down the slide happily

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科目：初中英語 來源：江蘇省南通市2019-2020學年七年級上學期期末英語試卷 題型：單選題