单项选择题

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A.Sue got promoted.
B.John had to quit his job.
C.Both John and Sue got a raise.
D.Sue failed to complete her project.
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问答题
White lilies are used as________on the Easter holiday.
单项选择题
The primary purpose of the passage is to discuss ______.
A.the difficulties of applying technological solutions to the problem of food shortages
B.the means of assessing the extent of the world food shortage
C.the costs of introducing a new food technology into a developing country
D.the nature of the new technological innovations in the area of food production
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