I always regretted not_________ harder when l was young．

No matter how many times I have read the sentence, I just find it does not_________ .

I always regretted not_________ harder when l was young． A: studyin9 B: having studied C: to study D: D to have studied

Treasury bills do not_________ A: pay interest. B: have a maturity date. C: have a face amount. D: have an active secondary market.

Money market securities have all the following characteristics except they are not_________ A: short term. B: money. C: low risk. D: very liquid.