A.K.
B.Cu.
C.Cr.
D.W.

A.O2.
B.NO2.
C.N2.
D.O3.

A.Zn.
B.Al.
C.Fe.
D.Mg.

A.Fe2(SO4)3.
B.Fe2O3.
C.Fe(OH)3.
D.FeO.

A.25
B.75
C.50
D.250

A.1080 gam.
B.432 gam.
C.1350 gam.
D.864 gam.

A.Ag.
B.Zn.
C.Cu.
D.Au.

A.1,344.00
B.0,896.
C.2,240.00
D.0,448.

A.focusing
B.breaking
C.imposing
D.judging

A.didn’t he
B.don't they
C.did they
D.didn't they