517.(10-11，河南方城一高高二第一次月考)Younger people shouldn’t be doing exercises　　　 for 18-year-olds.

A. intended　　 　　B. intending　　　 C. used　　　 D. using

516.(10-11，河南方城一高高二第一次月考) 　　　　at home doing his homework all day, the little child could hardly stand it any longer.

A. Leave　　　 B. Leaving　　 C. To be left　　　 D. Left

515.(10-11，河南方城一高高二第一次月考)He looked around and caught a man　　　　 his hand into the pocket of a passenger.

A. put　　 B. to be putting　　 C. to put　　 D. putting

514.(10-11，河南方城一高高二第一次月考)　　　 the big snake, the little girl stood under the tree　　　 to death.

A. Seeing; frightened　　 B. Seeing; frightening　　 C. Seen; frighten　　　 D. To see; frightening

513.(10-11，河北魏县一中高二第二次月考)When I opened the door, I found my mother sitting in the chair, completely　　 a book.

A. absorbing in　　　　 B. absorbed in　　 C. absorbing　　　 D. absorbed to

512.(10-11，河北藁城一中高二上第一次月考)　 ___________, many workers from the countryside went back home ahead of time to spend the spring festival together with their family.

A. Getting paying　 B. Got to pay　 C. Having got paid　 D. To get paid

511.(10-11，河北藁城冀明中学高二10月月考)　 　　　 with so much trouble, we failed to complete the task on time.

A. Faced　 B. Face　 C. Facing　 D. To face

510.(10-11，河北藁城冀明中学高二10月月考)　 ________confidence and the necessary equipment, they failed to rescue the 42 miners trapped in the coal mine.

　A. Lack of　　 B. Lacking of　　 C. Lacking　　 D. Having lacked

509.(10-11，河北藁城冀明中学高二10月月考)　 ______ many times, he finally understood it.

A Told　　　 B Telling　　 C Having told　　　 D Having been told

508.(10-11，河北藁城冀明中学高二10月月考)　 The pilot asked all the passengers on board to remain______ as the plane was making a landing.

A seat　　 B seating　　 C seated　　　 D to be seating