The children went home from grammer school, their lessons_____ for the day.

A. finishing B. finished C. had finished D. were finished

12. --- Come on, please give me some ideas about the project.

---- Sorry. With so much work ______ my mind, I almost break down.

A. filled B. filling C. to fill D. being filled

13--- What do you suppose made her worried?

--- ______ a gold ring.

A. Lost B. Lost C. Losing D. Because of losing

14. With everything she needed _____, she went out of the shop, with her hands full of shopping bags.

A. bought B. to buy C. buying D. buy

15. In order not to be disturbed, I spent three hours ______ in my study.

A. locking B. locked C. to lock D. to have locked

16. He is a student at Oxford University, _____ for a degree in computer science.

A. studied B. studying C. to have studied D. to be studying

17. Please remained _______ until the plane has come to a complete stop.

A. to seat B. to be seated C. seating D. seated

18. After a knock at the door, the child heard his mother's voice ______ him.

A. calling B. called C. being called D. to calll