D

a: Xét ΔABM và ΔACM,ta có:

AB=AC

AM chung                    }

BM=CM

=>ΔABM=ΔACM

26 A ,27 D, 28 C ,29 A ,30 A, 31 B ,32 A ,33 D ,34 C ,35 C

21. B

22. C

23. B

24. C

25. D

26. A

27. D

28. B

29. D

30. B

B

B

45. The English test today is really difficult. No one can complete it. A. exciting B. tricky C. planned D. easy

46. Linh is the most intelligent student in her class. A. new B. lonely C. stupid D. smart A. stir B. mix C. pour D. serve

47. Solving that math problem was a piece of cake to me. I just needed two minutes. A. very hard B. very easy C. very delicious D. very cheap

15C

16A

17D

A

nhớ là 50 GP đấy nhé