单项选择题

For the sake of efficiency, you are supposed to turn in your proposal ______ next Monday morning at the latest.

(A) on
(B) until
(C) for
(D) by
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单项选择题
Unless Jessica finishes inputting her documents by 2:00, there is no chance she will ______ the project deadline.
(A) meet
(B) fulfill
(C) arrive
(D) accomplish
单项选择题
For many middle-aged people, when it comes to ______ for retirement, they are not quite sure about how much money they should save and spend.
(A) prepare
(B) preparing
(C) prepared
(D) prepares
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