单项选择题

Outside my office window there is a fire ______ on the right.

A．escape
B．ladder
C．steps
D．stairs
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单项选择题
Ph. D. students who haven't completed their dissertations by the time their fellowships expire face a difficult
A．comer
B．dilemma
C．perplexity
D．bewilderment
单项选择题
______ touched me most was that the poor old lady donated all her savings to support one dropout.
A．That
B．It
C．Which
D．What
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