题目内容
21、The flight attendant welcomed us __________ the plane.
A．abroad B．aboard C．board D．broad
试题答案
21、B
The flight attendant welcomed us ___ the plane.
A．abroad
B．aboard
C．board
D．broad
The flight attendant welcomed us __________ the plane.
The flight attendant welcomed us ___ the plane．
A．abroad B．．aboard C．board D．broad