These teenagers have been playing video games for many hours　　  , and seem unwilling to stop.

   A. on end　　    B. on purpose　　　　 C. on hand　　　　　　 D. on business

Jack is often referred to 　　   at the factory.

   A. as the best engineer　　　　　　 B. be the best engineer

   C. being the best engineer　　　　  D. by the president to be the best engineer

—Jane has certainly been working hard.

—　　   .

　　 A. So have her brothers　　　　　　　　　　 B. So her brothers have

　　 C. Her brothers have too　　　　　　　　    D. So have been her brothers

—How did you like the lecture?

—The lecture 　　   me to death.

　　 A. forced　　    B. bored　　　　　　 C. killed　　　　    D. put

Too lonely to 　　   anything worthwhile, this young girl devoted more time to chatting online.

   A. get out of　　   B. get back to　　   C. get away　　　　   D. get down to

—Oh, hi　　  ?

—Fine, thanks. By the way, how's your roommate?

   A. What's wrong with you　　   B. How're things going

   C. How do you do　　　　　　 D. Are you fine or poor

None of us consider him hard--------

A. to get along　　　　　　　　   B. to get along with

C. to get along with him　　　　   D. to be got along with

In front of the library 　　   many pine trees.

    A. was　　　　　　　　   B. had　　　　　　 C. stands　　　　　　 D. stand

Only when 　　  in 1945 　　  to return home.

    A. the war was over; he was allowed　　　　  B. was the war over; was he allowed

    C. the war was over; was he allowed　　　　  D. was the war over; he was allowed

The doctors did all they 　　   save the boy.

    A. could　　　　 B. could to　　　　　　 C. could to do　　   D. could do