【单选题】I had some problems _____ my homework.
【判断题】《丝路花雨》注重旋律的表现作用和民族的音乐语汇,不仅吸取了古曲的韵味和调式特点,以及民间戏曲音乐中的表现形式,还加入了古希腊音乐素材。
【单选题】I was too late to pick up my uncle at the airport because I had to finish some schoolwork.
【判断题】地形图等高距应根据比例尺的大小和地面起伏情况选定。
【判断题】地形图等高距应根据比例尺的大小和地面起伏情况选定
【单选题】I turned down his invitation to the party since I had to finish my homework that night.