My sister is determined. ________ she has made up her mind, nothing can change it. 
#67562
A
Though
B
Once
C
Unless
D
Until
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_______ she was invited to the ball made her very happy.
#67827
A
Whether
B
Because
C
What
D
That
_______ is the most useful invention?
#70076
A
Do you think which of these
B
Which of these do you think
C
Which of these you think
D
You think which of these