2. Viết chương trình nhập vào bán kính R. Tính và in ra màn hình diện tích và chu vi của hình tròn. 3. Viết CT nhập vào số nguyên B. Tính và đưa ra màn hình các kết quả như sau: - Bình phương B; Căn bậc hai B; lập phương B. 4. Viết chương trình nhập vào số mét (m). Tính và in ra màn hình cm, dm.

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2.

program b2;
uses crt;
var R:real;
    cv,dt:real;
const pi=3.14;
Begin
    clrscr;
    write ('Nhap ban kinh R= ');readln(r);
    dt:=pi*r*r;
    cv:=2*pi*r;
    writeln('Dien tich hinh tron la: ',dt:2:2);
    writeln('Chu vi hinh tron la: ',cv:2:2);
    readln;
End.

3.

program b3;
uses crt;
var b:longint;
Begin
        clrscr;
        write('B = ');readln(b);
        writeln('Binh phuong ',b,' = ',sqr(b));
        writeln('Can bac hai ',b,' = ',sqrt(b):2:2);
        write('Lap phuong ',b,' = ',sqr(b)*b);
        readln
End.

4.

program b4;
uses crt;
var a:integer;
Begin
        clrscr;
        write('nhap so (m): ');readln(a);
        writeln(a,'m = ',a*100,'cm');
        write(a,'m = ',a*10,'dm');
        readln
End.

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giup e voi I/ Supply the correct form of the verbs in brackets 1. You (think) ……………………… collecting stamps costs much money? 2. Every year, my mother (give) ……………………… me a nice doll on my birthday. 3. Jenny says she loves collecting pens but she (not/continue) ……………………… this hobby from next year. 4. If you wash your hands more, you (have)……………………. less chance of catching flu. 5. Getting plenty of rest is very good. It (help)…………………. you to avoid depression. 6. Mr. John (be) ……………………… principal of our school since last year. 7. I (see) ……………………… a car accident on this corner yesterday. 8. We like (come)……………………to school by bus, but we hate (stand)………………………. and (wait) …………………… in the rain. 9. ……………………… (you/ ever/ meet) anyone famous? 10. My mother (come) ……………………… to stay with us next weekend. 11. When he lived in Manchester, he (work) ……………………… in a bank. 12. We (be) ……………………… students for four years. 13. We are planting trees around our school now. Our school (be) ……………………… surrounded by a lot of green trees. 14. What ……………………… your father usually ……………………… (do) in the evenings? 15. My sister likes (cook) ……………………… very much. She can cook many good foods. 16. My father says when he's retired, he (go) …………………… back to his village to do the gardening. 17. They want (buy) ……………………… some meat for dinner. 18. Linh is my best friend. We (know) ……………………… each other for 5 years. 19. I enjoy (fish) ……………………… because it is relaxing. 20. How about (go) ……………………… to the movie theatre?

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