[ Grammar ]
By end of this year, Staff Sergeant Liu ____________ in the K9 training unit for thirty years.
A. serves
B. is serving
C. has served
D. will have served
Select your answer:
![](https://grammarquiz.net/static3/wait.gif)
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A. complex
B. not complex
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My friend, Lily, is addicted to too …….…. video games. She can play for hours every day.
A. much
B. many
C. enough
D. little