Why did they lower their heads in shame according to the passage？

A． They did not dare to answer.

B． They had mistaken the relationship of the mice.

C． They regretted driving a poor blind mouse away.

D． They did not express themselves much better.

[单选题]Why did the professor study the Brazilian students' behavior?A． He felt puzzled at the students' being late.B． He felt angry at the students' rudeness.C． He wanted to make the students come on time later.D． He wanted to collect data for one of his

[试题]Why did the author shout at the telephone?A． He was mad at the telephoneB． He was angry with his agentC． He was anxious about his wifeD． He was impatient with the secretary

[主观题]Why did you pick this organization?

[单选题]A．ccording to Allen, why did the people do better with pets around when l~cing stressful tasks?A．They have lower blood pressure.B．They become more patient.C．They are less nervous.D．They are in higher spirits.

[单选题]Why did American city residents want to live in the suburbs after World War Ⅱ?A． Because older American cities were dying.B． Because they were richer and needed more space.C． Because cities contained the wont pare of society.D． Because they could har

[单选题]Why did the villagers agree to sell frogs?A． The frogs were easy money.B． They needed money to buy visitors.C． They wanted to please the visitors.D． The frogs made too much noise.

[单选题]Why did the early Pilgrims want to share their feast with the Indians?A． To show friendship.B． To ask for their help in the coming winter.C． So they could eat some Indian bread puddings.D． To try to teach them to grow crops.

[单选题]Why did David decide to leave school and start working?A．He received lots of job offers.B．He was eager to help his mother.C．He lost interest in school studies.D．He wanted to earn his own living.

[单选题]Why did the woman leave her hometown?A．To lead a city life.B．To open a restaurant.C．To find a job.

[单选题]Why did Isaksen advise people not to have foreign pets?A．They attack human beings.B．We need to study native animals.C．They can’t live out of the rain forest.D．We do not know much about them yet.