31 The rescue squad worked quickly to clear the _____ and search for survivors after the devastating earthquake.
(A) foundation
(B) rubble
(C) meadow
(D) valuables
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統計: A(28), B(32), C(31), D(16), E(0) #3461800
統計: A(28), B(32), C(31), D(16), E(0) #3461800