20. 新鮮感一消失，店門口大排長龍的人潮地隨之煙消雲散了。
(A) No sooner had the novelty worn off than the large crowd of customers lining up at the store were nowhere to be found.
(B) As long as the sense of freshness vanishes, customers in the queue in front of the store will demonstrate at the scene.
(C) Hardly did the savory fad die out when the lined-up crowd had ceased to appear at the store.
(D) Once the refreshments are gone, a great crowd of queued-up customers stop to show up at the store.