20.We will stop at this location for two hours, and you are _____ to walk around and make some small purchases.
(A)available
(B)free
(C)pleased
(D)surprised

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統計： A(2), B(5), C(0), D(0), E(0) #3852785

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#7328222
第20題．我們將在這個地點停留兩小時，...
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