单项选择题


A．watched out
B．watched at
C．looked up
D．looked down
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单项选择题
A．face-to-faceB．hand-in-handC．neck-and-neckD．step-by-step
A．face-to-face
B．hand-in-hand
C．neck-and-neck
D．step-by-step
单项选择题
-- Who lives in this room
A．None
B．No one
C．No
D．Nothing
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