18. In 2011, a craze _____ “planking”—where people photographed themselves lying face down, usually in an odd public place— became popular.
(A) calling
(B) was called
(C) called
(D) to call
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統計: A(6), B(6), C(26), D(0), E(0) #3449301
統計: A(6), B(6), C(26), D(0), E(0) #3449301