Chức năng nào sau đây không phải của lipid? A. Dự trữ năng lượng. B. Vận chuyển các chất qua màng. C. Bảo vệ. D. Điều hòa tính lỏng của màng.

4. What / you / take /account / when you choose / career.

5. a break / tradition / this year’s festival / modern dances / along side traditional one.

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           How to choose the career

There come a point in everyone's life when we (1) .......... to start making our career decisions. Usually it is after leaving   school, college or university. The problems is that there is such a vast choice to consider. Many of there will not be (2) .......... interests to you at all. Choosing a suitable career needn’t be something you gamble too much with because you spend a large part of your life at work. If you have a some clear ideas about the career (3) .......... that you think you’d like to follow, talk to people who are doing that job to gain some enlightenment about what the job really involve, (4) .......... good and bad. What you really need to look for is a job that can (5) .......... your own individual need and interests. Job satisfaction is widely believed to be one of the most important things.

1.   A. had                      B. have              C. had had          D. were having

    2. A. in                       B. of                  C. by                  D. on

3.   A. break                   B. route              C. path                D. high

4.   A. either                  B. all                   C. neither           D. both

5.   A. indicate              B. associate       C. generate         D. accommodate

Being a teenager is tough. Tough for the boy or girl and tough for the parents. All sorts of worries that never before existed come to light at this time and without the benefit of the hindsight that parents prosses, having through it, they may seem insurmountable. The most common worries are: will I fight the boyfriend or girlfriend. What am I doing with my life? And last but not least, my parents don’t understand me. Coupled to these are stresses created by the pressures of examinations, where once again parents’ expectation may be a contributory factor.

Parents notice the signs of stress and often feel guilty, believing that the lack of teenagers’ part is their fault. There is a great deal of well-meaning advice on the subject, encouraging teenagers to speak out hand parents to listen but the heart of the problem lies in trust which should have developed earlier in childhood. Teenager will find it easier to share their thoughts if they sense that their parents went through similar experience; parents need to recall what being a teenager was like, and how they got through it.

    1. Which of the following could be the best title for the passage?

    A. Parents and children                         B. The smooth transition    

    C. The troubled teenage years                D. Recalling troubled childhood

    2. As used in the first paragraph the word in the first paragraph, the word insurmountable means:

    A. easy                   B. carefree              C. normal              D. insuperable

    3. What reason is given for teenagers feeling they cannot solve their problem.

    A. their lack of experience                    B. their relationship with their peer group

    C. their relationship with their parents   D. their difficult situation at school

    4. What is the writer arguing in the second paragraph ?

    A. Parents are wrong to blame themselves.

    B. Parents should seek professional guidance

    C. parents can help if a good relationship already exists

    D. the parents should put themselves in the teenagers’ shoes.

    5. The word “it” in the second paragraph refers to?

    A. lack of communication    B. advice         C. problem        D. being a teenager

Cho △ABC nội tiếp đường tròn (O); M là điểm chính giữa cung nhỏ BC, gọi I là tâm đường tròn nội tiếp △ABC. CMR: MB=MC=MI

\(\text{Tìm các số nguyên dương x, y, z thỏa mãn: 3x²-9y²+4z²+6y²z²=243}\)

\(\text{Giải hệ phương trình sau:}\left\{{}\begin{matrix}x^2+y^2+3=4x\\x^3+12x+y^3=6x^2+9\end{matrix}\right.\)