根据描述用适当的形容词填空
Jeremy always puts a lot of effort into what he is doing.
Jeremy is ____________.
Cindy is honest and open，not trying to hide what she knows or thinks.
Cindy is ____________.
Lucy was not thinking about what I was saying，but about something else.
Lucy was ____________.
Bruce is always determined to do what he wants to do，even if others may advise him not to.
Bruce is ____________.