( )we are to finish the work in time,I‘m not sureAWhether BIfCAlthough DWhy

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( )we are to finish the work in time,I‘m not sureAWhether BIfCAlthough DWhy
( )we are to finish the work in time,I‘m not sure
AWhether BIf
CAlthough DWhy

( )we are to finish the work in time,I‘m not sureAWhether BIfCAlthough DWhy
A
放句首,用whether 不用if

A

B