The numbers that researchers get from the experiments can be _______, just like number puzzles.
#73950
A
disappointing
B
inspiring
C
worrying
D
confusing
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The forest guards often find campfires that have not been ____ completely.
#65598
A
turned down
B
put out
C
put away
D
turned over
He will _______ you next week if he is free. 
#65695
A
drop in
B
drop in at
C
drop in on
D
call at
This college ___ boys to enter the army as officers.
#75336
A
prepares
B
supplies
C
offers
D
gives