44. be due to do sth 按期,按理该做某事,由于 eg. The train is due to arrive at 5 o'clock. / 火车应在五点到达。 eg. The failure is totally due to his carelessness. / 失败都是由他的粗心造成的。 45. be eager to do sth / be eager for sth 迫不及待做某事/...