阿摩線上測驗
63 Many factors________ to increased level of toxic gases and one factor which is often ignored by
people is the emissions of the public transportation.
(A) align
(B) contribute
(C) happen
(D) manage
答案：登入後查看
統計： A(23), B(113), C(31), D(21), E(0) #2886475
統計： A(23), B(113), C(31), D(21), E(0) #2886475
