When he walks ____ my desk , he often knocks my books ____ the floor.

It was after he got what he had wanted ________he realized it was not so important .

If he ________, I __________ him the truth.

MrsBlack would rather his husband did some housework when he’s free, but he _______

下列各句中，加点的成语使用正确的一项是（ ）