Before I talked with ______ scientist, I had never met ______ knowledgeable person like him.
#39391
A
a; a
B
the; the
C
the; a
D
a; the
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 They will lose the game _______ they try their best.
#37036
A
unless
B
once
C
since
D
after
The soft music sounds ________. We are all listening ________. 
#40989
A
happily; careful
B
beautifully; carefully
C
moving; careful
D
beautiful; carefully