阿摩線上測驗
21 Motorists are strongly advised to _______ when they drive along windy mountainous roads to avoid
plunging into a ravine.
(A)wear helmets
(B)take caution
(C)fasten seatbelts
(D)keep afloat
答案：登入後查看
統計： A(11), B(17), C(9), D(1), E(0) #1210123
統計： A(11), B(17), C(9), D(1), E(0) #1210123
