-axit HCL, H2SO4

-Cl2, H2SO4 đ , HNO3

- O2

khi phảng ứng với axit và khi tác dụng với những muối clorua của các kim loại đứng sau sắt

47 C 

48 KO NHỚ 

Câu 5: B

Chỉ có bài ở giữa là tự luận nên mình không tách :> Mất công lắm

I arrived in Hanoi and stayed with him last week
I was worried that you wouldn't come back
entertainment
wonderful
celebration

I arrived in Hanoi and stayed with him last week
I was worried that you wouldn't come back
entertainment
wonderful
celebration

A - B 
C - B
B - C - B - A - D - B - A - D - B - D

A - B

C - B

B - C - B - A - D - B - A - D - B - D

B -> COULD
B -> WAS
D -> SEEING
C -> X
I enjoyed the peaceful atmosphere in Hanoi
It takes us 2 hours to get there
tropical
natural
majority
Lunar New Year
Tet usually begins in late January or early February

B - C - C - D
C - B - B - D - A - D - C - C - B - C