S 4 mặt xung quanh là : 

S cần lát là:

18. A. are                         B. is                            C. do                           D. does

19. A. but                        B. and                         C. so                           D. Æ

20. A. on                         B. at                            C. for                          D. in

21. A. a lot                       B. much                      C. any                         D. many

22. A. cold                       B. hot                          C. warm                      D. cool

23. A. come                     B. comes                     C. coming                   D. is coming

24. A. has                        B. haves                      C. have                       D. having

25. A. are                         B. do                           C. is                            D. does

26. A. don’t                     B. isn’t                        C. are                          D. doesn’t

27. A. on                         B. in                            C. at                            D. by

Thu gọn

Diện tích hình thang là

( 4,5 + 2,8 ) x 1,5 : 2 = 5,475 (

is

is

are

is

is - am

are not

are

is she

are

I went to Ha Long Bay by boat.

ta lấy đường tròn nhân 3,14

hoặc lấy bán kính nhân 2 và nhân 3,14

khứu

câu 1: đen

câu 2: hoa