* Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.

  Do you know that your place on the family ladder may have certain effects on the sort of person you grow up to be? You may be the only child, the eldest, youngest or (31) _________ one; you may be the youngest of three boys or the eldest girl with a younger brother and sister. All the different combinations of relationships will have helped to make you the person you are. (32)________of years between your siblings and you also helps to shape your character.

  Knowing such details about your best friend or loved one (33)________also tell you about the type of friend or partner he needs. For example, a boy with a younger sister would normally (34)_________much better with a girl who has an older brother than with a girl who has a younger brother. Similarly, if your girlfriend is the oldest in her family, she would probably be more than a little domineering.

  Fortunately for all of us, family psychology is not totally accurate. There are always exceptions to the rule. Most important of all, we should always judge people (35)_________to who they are, not the relatives they have.

Điền vào số 31

A. middle

B. focus

C. center

D. average

Biết một gen qui định một tính trạng, tính trạng trội hoàn hoàn, các gen nằm trên các cặp nhiễm sắc thể khác nhau. Phép lai nào sau đây thu đuợc 2 loại kiểu hình với tỉ lệ 3 : 1?

(1) AABb  x AaBb ;    

(2) AaBb x aabb;        

(3) Aa x Aa ;   

(4) AaBB x Aabb

(5) Aabb x aaBb ;        

(6) AaBb x aaBb;      

(7) Aa x aa ;   

(8) aaBb x aaBb

A. (2), (4), (6), (8).

B. (1), (3), (4), (8). 

C. (1), (3), (5), (8). 

D. (1), (3), (5), (7).

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions

A. technology 

B. activity 

C. experience 

D. presentation

Cho dãy các chất sau: NaHCO₃, (NH₄)₂CO₃, NH₄Cl, Al₂O₃, K₂CO₃, K₂SO₄. Có bao nhiêu chất trong dãy vừa tác dụng được với dung dịch HCl, vừa tác dụng được với dung dịch NaOH?

A. 2

B. 3

C. 4

D. 5