单选题What might prevent Mary, aged 25, becoming a babysitter?

单选题Many gifts would like to ______ skirts in Summer.

单选题

单选题This class______now. Miss Gao teaches them. A. are studying B. is studying C. be studying

单选题It is the warmest season between spring and autumn.

单选题Which is ______ of all the subjects?

单选题Look! The children ______football.

单选题The word "frighten" in the passage means ______.

单选题Each of us ______ a company car.

单选题

单选题What do you think about fire? Fire is good servant 11 a bad master. This is an old English 12 . Once upon a time, people didn"t know 13 . 14 , they learnt how to make it. They also learnt how to 15 it. They used it to keep them warm. They also learnt how to cook food with it. Fire was their 16 . But sometimes a building catches fire. Sometimes the building is destroyed and people lose their homes. Sometimes people even 17 . Fire is not a servant then. It became a master. Why do fires begin? 18 starts then."? There are many reasons for tires. Perhaps an electric heater is placed how to do. They know how to put out the fire. They also know how to save people 19 . They save the people while they put Out the fire. They have long ladders to roach high windows. They help the people in the room 20 . If some people are hurt, they are taken to hospital in ambulance.

单选题I find ______ very hard to understand your English.

单选题The book on the desk is ______.

单选题Does the earth go ______ the sun?

单选题What would you do if you ______ live your life once again?