题目

【1】I was making model planeswhen my mother came back.（对画线部分提问）_______ _______ _______ _______ when your mother came back?【2】I think classical music is boring.（改为否定句）I _______ _______ classical music is boring.【3】My mother was doing the dishes at that time.（同义句转换）My mother was _______ the _______ at that time.【4】He read a story-book last night.（改为过去进行时）He _______ _______ a story-book at eight o’clock last night.【5】He wasn’t old enough to go to school. (同义句转换)He was _______ young_______ go to school水平抛出一个物体，经时间t后物体速度方向与水平方向夹角为θ，重力加速度为g，则平抛物体的初速度为（ ）A．gtsinθB．gtcosθC．gttanθD．gtcotθ