单词拼写(共5小题, 满分5分)

小题1:The couple a_________ a child last year , so they do not feel lonely now.

小题2:Sports shoes are not a______________ for a formal wedding.

小题3:As we all know, smoking has a harmful e__________ on all of us.

小题4:Father is strongly o________ to doing shopping on Sunday because the streets and supermarkets are full of people. Therefore, we all have to stay at home.

小题5:He worked hard day and night and e____________ he achieved his aim.

试述赫兹伯格的“激励-保健理论”。