Mother wanted to be a good provider, a role she _____ since her marriage to Father.
A.shoulders
B.shouldered
C.is shouldering
D.has been shouldering

We give time upace and love we can spare, and _______ , dogs gine us tea all.A.in all B.in factC.in short D.in return

A.
A.in
B.in
C.in
D.in

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预应力筋由多根钢丝或钢绞线组成时，同束内应采用（）的预应力钢材。

A．密度相等
B．质量相等
C．数量相同
D．强度相等

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