30. The　 mother didn’t know ___ to blame for the broken glass as it happened while she was out.

A. who　 B when　 C how　 D what

29. A cook will be immediately fired if he is found ___ in the kitchen.

A smoke　 B smoking　 C to smoke　 D smoked

28. “We　 can’t go out in this weather,” said bob, ___ out of the window.

A looking　 B to look　 C looked　 D having looked

27. I send you 100 dollars today, the rest ____ in a year.

A. follows　 B followed　 C to follow　 D being followed

26. All these gifts must be mailed immediately ____ in time for Christmas.

A. in order to have received　 B in order to receive　

C so as to be received　　　　 D so as to be receiving

25. When asked by the polite, he said that he remembered ____ at the party, but not _____.

A. to arrive, leaving　 B to arrive, leave　 C. arriving, leaving　 D. arriving, to leave

24. He glanced over at her,　 ___ that though she was thin, she seemed very well put together.

A.　　 having noted　 B . noted　 C. to note　 D. noting

23. the pilot asked all the passengers on board top remain ___ as the plane was making a landing.

A. seat　 B seating　 C seated　 D to be seating

22.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

21. having been ill in bed for nearly a month, he had a hard time ___ the exam.

A. pass　 B　 to pass　 C passed　 D passing