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B. marked C. to be marked D. having been marked2. It was so large a room that a hundred people looked ____ in it. A. losing B. lost C. to lose D. having lost 3. Laws that punish parents for their little children’s actions against the laws get parents ____. A. worried B. to worry C. worrying D. worry4. With ____ leaves ____ in the earth every year, the soil bees richer and richer. A. falling。 buried5. She was glad to see her child well ____ care of. A. take B. to be taken C. taken D. taking6. Friendship is like money easier made than ____. A. kept B. to be kept C. to keeping D. being kept7. Don’t use words, expressions or phrases ____ only to people with specific knowledge. A. being known B. having been known C. to be known D. known8. John rushed out in a hurry, ____ the door ____. A. leaving。 unlocking9. The girl ____ forward to buying a new gold watch. A. referred to look B. referred to looking C. referred to looks D. referring to looks10. The disc, digitally ____ in the studio, sounded fantastic at the party that night. A. recorded B. recording C. to be recorded D. having recorded11. ____ with the size of the whole earth, the biggest ocean does not seem big at all. A. Compare B. When paring C. Comparing D. When pared12. ____ time, he’ll make a first class tennis player. A. Having given B. To give C. Giving D. Given 13. ____ in thought, he almost ran into the car in front of him. A. Losing B. To lose C. Lost D. Having lost 14. ____ in 1636, Harvard is one of the most famous universities in the United States. A. Being founded B. It was founded C. Founded D. Founding