单项选择题

He ______ his examination if he worked harder.

[A] has passed
[B] should have passed
[C] could have passed
[D] would have passed

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单项选择题

When was Canada’s first national park completed [Al 1883 [B] lass. [C] 1886. [D] 1888.

When was Canada’s first national park completed
[Al 1883
[B] lass.
[C] 1886.
[D] 1888.

单项选择题

Jane owes ______ to her father that she has been able to finish her college education.

[A] that
[B] much
[C] it
[D] /

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