题目

用配方法解下列方程，其中应在左右两边同时加上4的是（   ）A.               B.C.               D.  答案：C解析:略 (    )12.—It is important to learn how to_at    the    table before going to othercountries.—Yeah，table manners are quite different.A. perform    B.    behave    C.    eat    D.    show