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
It's hard to confirm or refute that there's a causal relationship between the amount of fat we eat and the of heart attacks.
[A] incidence
[B] impetus
[C] momentum
[D] emergence
单项选择题
By the end of next month we ______ the review on the research findings.
[A] will finish
[B] will be finishing
[C] will have finished
[D] have finished
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