【题目】果蝇红眼对白眼为显性，控制该性状的基因位于X染色体上。果蝇缺失1条Ⅳ号染色体仍能正常生存和繁殖，缺失2条则胚胎致死。一对都缺失1条Ⅳ号染色体的红眼果蝇杂交（亲本雌果蝇为杂合子），则F1中（ ）

A．缺失1条Ⅳ号染色体的红眼果蝇占3/8

B．染色体数正常的白眼果蝇占1/4

C．缺失1条Ⅳ号染色体的白眼果蝇占1/4

D．染色体数正常的红眼果蝇占1/4

【题目】听一段材料，回答下面几个小题。

【1】Where is the speaker giving the talk?

A.On a hill.

B.In a forest.

C.Beside a lake.

【2】What can the listeners do at Summit Lake?

A.Rest and take photos.

B.Go boating or swimming.

C.Cook lunch over a campfire.

【3】What would be part of the trip?

A.Climbing up rocks.

B.Fishing in a stream.

C.Walking through a field.

【题目】听一段材料，回答下面几个小题。

【1】Who is the woman?

A. A candidate.

B. A radio announcer.

C. A campaign manager.

【2】Where will they put the posters?

A. In the hallways.

B. In the classrooms.

C. In the cafeteria.

【3】What will the man do tonight?

A. Make posters.

B. Write a speech.

C. Answer questions.

【题目】听一段材料，回答下面几个小题。

【1】What is the man doing?

A. Offering help.

B. Giving advice.

C. Making appointments.

【2】What is the relationship between the two speakers?

A. Doctor and patient.

B. Husband and wife.

C. Classmates.

【题目】听一段材料，回答下面几个小题。

【1】What was Paul concerned about?

A. His professor.

B. His final exam.

C. His physics grades.

【2】Why did the woman tell Paul not to worry?

A. The average is important.

B. Chemistry is not his major.

C. He needs to concentrate on physics.

【3】What did the woman suggest doing?

A. Studying harder.

B. Going for a coffee.

C. Repeating the class.

【题目】听一段材料，回答下面几个小题。

【1】Why does the man feel bad?

A.He is out of work.

B.He isn’t used to the life there.

C.He has nobody else to talk to.

【2】In what way is the woman speaking to the man?

A.Disappointing.

B.Exciting.

C.Encouraging.

【3】According to the dialogue,what is their last decision?

A.To look for a job together.

B.To have a visit.

C.To move to the island.

【题目】听一段材料，回答下面几个小题。

【1】What was the woman disappointed at?

A. The speeches.

B. Samantha's pronunciation.

C. The result of the competition.

【2】According to the woman, how did most of the listeners feel about the result of the competition?

A. They were astonished.

B. They were excited.

C. They were satisfied.

【3】What do the man and the woman disagree on?

A. Whose speech was better.

B. Whose pronunciation was better.

C. Whose speech was meaningful.

【题目】听一段材料，回答下面几个小题。

【1】What’s the relationship between the woman and the man?

A.Teacher and student.

B.Mother and son.

C.Classmates.

【2】Why didn’t the man come to the class last night?

A.He came back late and his friend was tired.

B.He had given it up.

C.He had been writing reports all day long.

【3】What can we know about the man?

A.He is interested in learning foreign languages.

B.He can communicate with his friends in English.

C.He had studied the language before he came.

【题目】How's the woman going to the airport?

A. By bus.

B. By car.

C. By taxi.

【题目】听一段材料，回答下面几个小题。

【1】What is the man trying to return to the store?

A.A dress.

B.A shirt.

C.A sweater.

【2】Why does the man want to return the item?

A.It is the wrong size.

B.It has a hole.

C.It gets smaller and fades.

【3】What does the woman offer to do for the man?

A.Return his money.

B.Exchange the item.

C.Give him store credit.