A.of
B.from
C.with
D.in

A.Despite
B.Therefore
C.Because
D.While

A.number
B.amount
C.lot
D.few

A.
B.
C.
D.

A.
B.
C.
D.

A.
B.
C.
D.

A.metanal, glucozơ, axit metanoic, fructozơ, metylamin.
B.metanal, metyl fomat, axit metanoic, metylamin, glucozơ.
C.etanal, axit etanoic, metyl axetat, phenol, etylamin.
D.metyl fomat, etanal, axit metanoic, glucozơ, metylamin.

A.46,9.
B.62,3.
C.61,5.
D.51,3.

A.20%.
B.40%.
C.80%.
D.30%.

A.5
B.3
C.4
D.2