20. After Sophia swore that she would keep her little brother in sight, her mother ______ agreed to let them go hiking by themselves.
(A) reluctantly
(B) jealously
(C) innocently
(D) tediously
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統計: A(123), B(1), C(9), D(11), E(0) #1760390
統計: A(123), B(1), C(9), D(11), E(0) #1760390