1 . It doesn't make sense ________(buy) such a cheap computer just to save a few dollars.（用所给词的适当形式填空）

2 . I can’t make __________ (sensitive) of the painting.(所给词的适当形式填空)

3 . His strange habit _________（make）sense when you consider that he's an environmental scientist who studies how to reduce litter, including things that fall off garbage trucks as they drive down the road. (所给词的适当形式填空)

4 . Maybe I'm the rude one for not appreciating life's little courtesies(礼节). But many social norms(规范) just don' t make sense __________people drowning in digital communication. (用适当的词填空)

5 . The teenager tried to make sense _________what the composer was saying, but failed.(用适当的词填空)