Look! That fellow is too sleepy to work. He ______ up reading until midnight.
In many cities of China, if an ambulance is_______ in a traffic jam, police will respond to the emergency.
— I don’t remember having ever seen John since last week. Has he gone somewhere?— Not really. He_______ his newly-bought apartment.
— Have you ever been to the Summer Palace?— I can’t quite remember. _______, it might have been during my childhood.
— Your windows are still open? It’s so cold!— Oh, sorry. They_______ .
We believe the time and hard work _______ in completing such an important project are worthwhile.