A. It
B. As
C. Which
D. That
A.for the first time
B.the first time
C.on the first time
D.at first
A.it B.that C.which D.what
A.so diligent B.such diligent C.so much diligent D.such very diligent
A. Unless
B. If
C. Because
D. Provided
A.having worked on
B.to work on
C.on work
D.working on
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