问题,质疑 n./v   q_______

方面,特点 n.   d_______

实体 n.   e_______

抛弃 v.   r_______

上传 v.   u_______

有效的 adj.   v_______

论坛 n.   f_______

In addition to _______ (buy and sell) products, e-business may also handle other traditional business aspects.

The fewer clicks _______(need) to order, the better.

If having one form of live support is good, having many _______(choose)from is better.