题目内容

18．There isn't_______ juice in the fridge．You'd better buy some．（　　）
A．noB．anyC．someD．many

分析 冰箱里没有果汁．你最好买一些．

解答 答案：B，考查形容词词义辨析．句意"冰箱里没有果汁．你最好买一些．"no没有、不是，做否定回答；any任何、一些，常用于否定句；some一些，常用于肯定句；many许多，接可数名词复数．根据题干There isn't_______ juice in the fridge．You'd better buy some．句子是否定句，juice是不可数名词．故选B．

点评 理解各个选项的含义及其用法，根据具体内容作答．

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Teeth are important. Strong , healthy teeth help you chew(咀嚼) foods that help you grow. They help you speak clearly. And yes ,they help you look best. Here are some tips for you to take care of your teeth:

1. Brush your teeth the right way.

Brush your teeth at least twice a day – after breakfast and before bedtime. If you can, brush after lunch or after sweet snacks, too. Brush all of your teeth, not just the front ones. Spend time brushing teeth along the sides and back of your mouth. Spend at least three minutes each time you brush. Play a song you like to help pass the time. Get a new toothbrush every three months. When you buy toothbrush, be sure it has soft bristles(鬃毛).

2. Learn how to floss(用牙线清洁牙齿) your teeth.

Flossing is a very important way to keep your teeth healthy. Food may hide between two teeth. Flossing can help get rid of it. You’ll need to floss your teeth at least once a day.

3. Have good eating habits.

You need to be careful about what you eat and drink. Eating sugar is a major cause of tooth decay(蛀牙).Eat lots of fruits and vegetables and drink water instead of soda(苏打).

1.How many times at least should we brush our teeth a day?______

A. 1 B. 2 C. 3D. 4

2.What is the major cause of tooth decay? ______

A. Not brushing teethB. Not changing toothbrush

C. Eating sugar D. Not flossing teeth

3.How often should we change our toothbrushes? ______

A. never

B. three times a month

C. every three months

D. every month

4.The bristles of the toothbrush must be______

A. hardB. soft C. expensive D. not mentioned

5.Which is the right way to take care of teeth? ______

A. Only brush front teeth.

B. Not brush teeth before sleeping.

C. Spend at most three minutes to brush teeth each time.

D. Eat lots of fruits and vegetables and drink water instead of soda.

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