单项选择题

Workers who can multitask—undertaking up to five activities at one time and successfully managing all of them—are in demand now more than ______.

(A) whenever
(B) ever
(C) just
(D) then
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单项选择题
Records show that the federal government is the ______ largest purchaser of the firm's advanced aerospace technologies.
(A) later
(B) single
(C) once
(D) every
单项选择题
Mr. Aldridge ______ to chair the committee on ethics reform although he has no experience in such a leadership position.
(A) proposed
(B) insisted
(C) advised
(D) supported
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