The ants, hardworking _______ they are, have their time for play

The ants, hardworking _______ they are, have their time for play.
A、if
B、as
C、since
D、though
【正确答案】:B
【题目解析】:hardworking as they are 部分倒装,原句为as they are hardworking。因此选B.