题目内容

The airline stewardess (空姐) said to passengers on ______ with a beautiful smile, “welcome _________!”
A．aboard; board B．board; aboardC．board; board D．aboard; aboard
B
词义辨析。固定词组On board在船,火车,飞机上(的)；aboard登船，登飞机；句意：航空公司的空姐微笑着对飞机上的乘客说：欢迎登记。
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