单项选择题

The value of our house soared, enabling us to ______ to a larger place.

[A] trade down
[B] trade on
[C] trade in
[D] trade up

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单项选择题

How can a nonscientist explain an abstract theory with such ______.

[A] confidence
[B] assurance
[C] self-possession
[D] insurance

单项选择题

Merry is a woman of ______ who has never abandoned her principles for the sake of winning a vote.

[A] honesty
[B] reputation
[C] integrity
[D] notoriety

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