By 1990, production in the area is expected to double ________ of 1980.
(A) that
(B) it
(C) one
(D) what

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統計： A(342), B(137), C(188), D(78), E(0) #330485

詳解 (共 2 筆)

#930737
that 代替前方的 production
production in the area is expected to double that(=production) of 1980
3
1
#440051
that of = which is
2
1