9. Before the party, we spent several hours ________ the room with ribbons and balloons.
(A) decorating
(B) monitoring
(C)predicting
(D) strengthening
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統計: A(562), B(5), C(35), D(4), E(0) #1560009
統計: A(562), B(5), C(35), D(4), E(0) #1560009