【华慧考博】考博英语每日一练（12.17）考博加油！ 1. Hardly _______ the train_______ when the waiting crowd ran towards it. A. did, arrive B. has, arrived C. had, arrived D. was, arriving
2. A network of miniature toxin detectors has been ______ in 30 American cities for the sake of bio-security. A. deployed B. committed C. indulged D. immersed
【考博英语句子补全】 1. 牛肉为他们的课外活动提供许多能量。 Beef gives them much ________ ________ their after-school ________. 2. 我每晚睡觉都超过7小时。 I sleep for ________ ________ seven hours every night.
