A. concerns
B. patents
C. roles
D. sciences
A. would walk
B. will walk
C. walks
D. are walking
A. to work/ to stay
B. work/ stay
C. working/ staying
D. worked/ stayed
A. was
B. had been
C. is
D. has been
A. Math
B. Mathematics
C. Mathematician
D. Maths
A. access
B. campus
C. path
D. impact
A. computer
B. button
C. much
D. umbrella
A. manual
B. tray
C. marigold
D. challenge
A. monitor
B. socket
C. remove
D. icon
A. impact
B. monitor
C. line
D. install
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