,其中“They”和“teeth”(复数)表明问题的主语是复数形式。 1. **A. are this**:错误,this为单数代词,与复数形式的主谓结构矛盾(are + this不匹配)。 2. **B. is this**:错误,is与单数this一致,但回答中“They are”明确对应复数主语,无法对应单数疑问。 3. **C. are these**:正确,these为复数...
So,teeth are not only used for eating.They're also useful for building homes,digging holes,protecting themselves,fighting and keeping themselves clean!(1)What does Paragraph 1 mainly talk about? BA.The care of teeth.B.The use of teeth.C.The teeth of animals.D.The teeth of people.(2)...
In the human mouth, there are different types of teeth. Each type has a specific shape and function that contributes to efficient mastication & oral health.
While consonant sounds are differentiated by how the air is blocked—such as sticking the tongue behind the front teeth for d and t or closing the lips for b, m, and p—vowel sounds are differentiated by pitch, accent, volume, and duration. The letters a, e, i, o, u—and sometimes...
22.B)They moved ou of Africa about 60,000 years ago. 23.D) The discovery of two modern human teeth in China. 24.A) There must have been some reason for human migration. 25.D) What path modern humans took to migrate out of America. ...
科普知识) What are teeth used for? For people, they are for eating, But for animals, teeth are good for more than just eating. They might be used for fighting,sending messages, building homes or even cleaning themselves.Many animals use their teeth to fight. Elephants have tusks(长牙) tha...
Passage 3小小的牙齿,大大的学问What are teeth used for? "That's easy," you say. “Teeth are for eating." You're right. For humans, that's the purpose of teeth. But, for ani-mals, teeth are good for more than just eating.They might be used for fighting, communicating, or even bui...
3.How far is the girl’s home from her school? A.5 kilometers. B.5.5 kilometers. C.6 kilometers. 4.When will the woman leave? A.As same as the man. B.Earlier than the man. C.Later than the man. 5.What are the speakers talking about?
The elephant is one of Thailand's symbols. 大象是泰国的象征之一。 This is a symbol of good luck. 这是一个好运的象征。 Elephants are smart animals. 大象是很聪明的动物 They can play soccer or music. 他们能踢足球或弹...
However ,over the past 12months, those commuters have alsoexperienced some of the worst rail strikes in years .Itis all very welltrain operators trumpeting the improvements the are making to thenetwork .but passengers should be able to expect a basic level ofservice for the substantial sums they...