Were you _______ when you saw that wildanimal

依次填入下面的一段文字横线处的语句，衔接最恰当的一组是（    ） 对中学生加强文化科学知识的教育是完全必要的，但是否可以放松思想品德教育呢还要不要对学生进行爱国主义、集体主义、尊师守纪、热爱劳动的教育呢_______________ 。

I like black coffee so much that the stronger it is, ________.

He was busy preparing his lessons, only _________ occasionally to have some tea.[ ]

I need to advertise for a second-hand mountain bike.— _______David just plans tosell his present one.