Mike was usually so careful,________this time he made a small mistake. 
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A
yet
B
still
C
even
D
thus
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 There were lots of people standing watching, yet no one of them ________. 
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A
offered to help
B
offered helping
C
was offered to help
D
was offering help
He became self-satisfied because of his _____.
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A
achievements
B
observation
C
behavior
D
Interests