29. There _________ more than ten thousand visitors since the book fair started. 
(A) is
(B) were
(C) have been
(D) will be

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統計： A(2), B(2), C(20), D(1), E(0) #3173509

詳解 (共 1 筆)

#6217070
這句的重點是since，也就是說從...開始，因此要使用完成式have+Vp.p have been 
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