______, due to unforeseen circumstances, this year's show has been cancelled.
A. Unfortunately
B. Undoubted
C. Fortunately
D. Obvious
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______, you have mistaken me for somebody else.
A. Unfortunate
B. Fortunately
C. Undoubtedly
D. Obvious
Various setbacks and problems ______ production.
A. devastate
B. delayed
C. postpones
Delegate
This is the beauty and ugliness, good and evil ______.
A. on contrast
B. of contrast
C. at contrast
D. in contrast
And anxiety can, ______, lead to a number of physical and emotional problems.
A. in turn
B. on turn
C. at turn
D. to turn