单项选择题

A．She thinks the man should have helped earlier.
B．She doesn’’t need the man’’s help.
C．She doesn’’t know the boxes are heavy.
D．She wants the man to help with the boxes.
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单项选择题
A．She doesn’’t remember much about the city.B．She’’s never been to the city.C．She would find someone else to help.D．She would talk to the man later.
A．She doesn’’t remember much about the city.
B．She’’s never been to the city.
C．She would find someone else to help.
D．She would talk to the man later.
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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