When he was doing the software development project, he ___________ many problems that he had to solve on his own. 
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A
came up with
B
came through
C
came across
D
came out
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I don’t think the watch will ______ much. It is ______ $30 at most.
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A
cost, worth 
B
worth, cost 
C
spend, worth
D
worth, spend
She is working hard all day long, which will surely ______her success in her future work. 
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A
result from
B
contribute to
C
benefit from
D
stick to