________ returning from the trip, Margaret, who was an advisor to an aid agency in Chicago, would make a report about the health conditions she observed in the region.
A. In
B. Upon
C. For
D. At
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Some scholars argue that the underdevelopment of East and Central Europe may ________ be accounted for by their geographic location, and resources, or the lack thereof.
A. in part
B. in degree
C. in kind
D. in sense
This is the world’s largest industrial ________, held each year in Germany, displaying hundreds of robotic arms and sensor systems.
A. innovation
B. exploration
C. illustration
D. exposition
GPS virtually tells drivers how to get where they’re going, so ________ bother stopping and asking a real person for directions when a gadget can do the trick?
A. where
B. why
C. which
D. what
Low-achieving students tend to be more dependent on classmates, but high-achieving students generally engage more often in ________ interactions with classmates.
A. reckless
B. respective
C. routine
D. reciprocal