______ halfway through the exercise, the teacher changed his mind and collected all our papers.

Tom hardly hands in his homework on time， does he—________.Our teacher is always angry with him.

He was___________ tired___________ he fell asleep as soon as he lay down.—Oh, we can go out and let him have a good rest.

第一部分：单项选择—Make sure you have turned off the air conditioners before going out—_______________

In the reading room, we found her_______at the desk,with her attention______on a book.