阿摩線上測驗
40. Cellphones are now so convenient that a business person can and often do save valuable office time by efficiently making telephone calls.
(A)so convenient
(B)often do
(C)by
(D)making
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統計： A(70), B(569), C(68), D(68), E(0) #1307603
統計： A(70), B(569), C(68), D(68), E(0) #1307603
