John is not very       — he often forgets what he promises to do.

________other workers，the boss finds，Hank is ________worker in his company.

        to his scientific research, the professor cared little about his family.

 ----Do you have any idea why Mark is leaving?---- No. In fact, everyone is ________about it．

He was an _____ poet at that time and his _____ poems spread through all the country.