[ Grammar ]
They studied hard although ______.
A. they were tired
B. they were good friends
C. they were happy
D. they had a lot to eat

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Vocabulary › Viewto leave one’s home country or area to live in another
A. population density
B. emigrate
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(adj) dependable; trustworthy
A. doubtful
B. reliable
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Grammar › View
Daniel hasn’t seen his grandparents _______.
A. since 2005
B. in five years
C. in 2005
D. five years ago
