阿摩線上測驗
37. Riding your bicycle to work __________ a great way to exercise and save money.
(A) is
(B) are
(C) that is
(D) that are
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統計： A(510), B(15), C(49), D(4), E(0) #1934889
統計： A(510), B(15), C(49), D(4), E(0) #1934889