单项选择题
A．the difficulties in teaching spelling B．the role of spelling in general language development C．the complexities of the basic writing skills D．the necessity of teaching spelling
A．smile to each other B．feel awkward and look away immediately C．try to make a conversation with each other D．none of the above
A．the importance of eye contact B．the potency of nonverbal techniques C．successful speech delivery D．an effective way to gain visual feedbacks