The Christmas tree was decorated with shining ________ such as colored lights and glass balls.
A ornaments
B luxuries
C exhibits
D complements
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The two most important ________ in making a cake are flour and sugar.
A elements
B components
C ingredients
D constituents
No one imagined that the apparently ________ businessman was really a criminal.
A respective
B respectable
C respectful
D realistic
If nothing is done to protect the environment, millions of spiders that are alive today will have become ________.
A deteriorated
B degenerated
C suppressed
D extinct
The ________ of the scientific attitude is that the human mind can succeed in understanding the universe.
A essence
B texture
C content
D threshold