单选题 Blood is very important. when doctors understand how blood goes around inside the body, they try ways of giving blood to people who need it. They take blood from the healthy people and give it to the patient in need of blood. This course is ( 1 ) “blood transfusion (输血)”.
But there are two problems. First, it does not always work. Sometimes people die when they ( 2 ) blood transfusion. Later, doctors find that we do not all have the same kind of blood. There are four groups --- O,
A, B and AB. We all have blood of one of these groups. They also find that they can give any kind of blood to people of group AB. But they find that they ( 3 ) give A-group blood to A-group people and B-group blood to B-group people. If a person has O-group blood and the doctor could give his blood to anyone else safely.
There is another problem. To give blood of the right kind, doctors have to find a person of the right blood group。Often they cannot find a person in time. At first they find they can keep the blood in bottles for fifteen to twenty days. They do this by ( 4 ) it very cold. They find how to keep it longer in the end.
One day, when you grow up, you may decide to give blood to a “blood bank”. In this way, you may stop ( 5 ) dying. Or perhaps one day you may become ill and need some blood with the same kind.
问根据短文内容,在A、B、C、D、E五个选项中,选出最佳答案填入文中【4】处。().

A、 have
B、 from
C、 must
D、 making
E、 called
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问根据短文内容,在A、B、C、D、E五个选项中,选出最佳答案填入文中【1】处。().

A、have been asking
B、which
C、who
D、to install
E、estimated

单选题 More and more people have to install burglar alarms in their houses if they want to get insurance. Insurance companies ( 1 )people in certain areas to install the alarms before they will give them insurance for the past year. This is due to increasing crime in some parts of the country. This can be a problem for people ( 2)are struggling to make ends meet(收支平衡). The alarms, (3) can be very expensive, need to be installed by an electrician. It is ( 4 )that 20% of homes have alarms installed, and that another 20% of people plan to have them installed but have not installed them yet. The insurance companies told people ( 5 )the alarms on all doors and windows.
问根据短文内容,在A、B、C、D、E五个选项中,选出最佳答案填入文中【4】处。().

A、have been asking
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问根据短文内容,在A、B、C、D、E五个选项中,选出最佳答案填入文中【2】处。().

A、in
B、at night
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单选题 Kate and Sandy are American students. They are sisters. They live in town now. Kate is older than Sandy. She likes ( 1 ) in town very much. Kate thinks living in town is more interesting than living in the country. There are more parks, shops and cinemas ( 2 ) town than in the country. She especially likes the lights in town. She thinks the lights (3) are more beautiful than the stars. She likes reading and reads more quickly than Sandy. Often Kate reads until very late at night.
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问根据短文内容,在A、B、C、D、E五个选项中,选出最佳答案填入文中【1】处。().

A、in
B、at night
C、better
D、living
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Sandy likes the country ( 4 ). She thinks the country life is quiet. There is less noise and fewer cars. She likes to visit her Aunt Peggy. She often helps her aunt with her work. Sandy likes running. She runs faster than Kate. In the country Sandy can run longer than in town. She also thinks running in the country is the ( 5) exciting thing to do.
问根据短文内容,在A、B、C、D、E五个选项中,选出最佳答案填入文中【3】处。().

A、in
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A、have been asking
B、which
C、who
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A、have been asking
B、which
C、who
D、to install
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A、have been asking
B、which
C、who
D、to install
E、estimated