_____, experts point out that students can easily fail at starting their business because of a lack of preparations. 
#80650
A
But
B
However
C
while
D
though
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____________, so he didn’t come to school last week.
#31101
A
Though he was ill
B
Being ill
C
Having been ill
D
He was ill
Cheer up! It won’t be ______ we can meet again.
#30145
A
before long
B
long before
C
after long
D
long since