(B)21.We're spending more money ________ food than we used to.

A£®in¡¡¡¡¡¡¡¡¡¡B£®on¡¡¡¡¡¡¡¡¡¡C£®with¡¡¡¡¡¡¡¡D£®for

(A)22.________ we have a few minutes to wait for the train£¬let's have a cup of coffee.

A£®Since  B£®Although  C£®Before  D£®While

(D)23.My father always makes a terrible ________ when he cooks.And he never cleans it up.

A£®matter  B£®decision  C£®pollution  D£®mess

(D)24.It's ________ that I am working while everyone else is enjoying themselves!

A£®similar  B£®educational  C£®independent  D£®unfair