赞题库-背景图
单项选择题

The question was so unexpected that, for a moment, Arthur was______ a loss how to reply to it.

A．at
B．in
C．on
D．of
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热门试题

单项选择题His big, blue sweater has______completely out of shape.

A．swollen
B．spread
C．stretched
D．extended

单项选择题Her parents insisted that she______until she finished her degree.

A．stayed
B．stays
C．stay
D．would stay