题目

栀子花开，香气四溢，此现象说明       A．分子在不断运动                               B．分子间有间隔        C．分子的体积很小                    D．分子的质量很小 答案：AI ___________ to phone her all day, but whenver I phone her, the line is engaged.A．triedB．had been tryingC．have triedD．have been trying