过去分词作定语与状语

A. Told many times B. Having been told many times C. He has been told many times D. Though he had been told many times

15. _______and _______，they ran out of the classroom. A. Being excited；happily B. Exciting；happy C. Exciting；happily D. Excited；happy

16. _______from this point of the view，the question will be of great importance.

A. Considering B. Considered C. Being considered D. Consider

17. Though _______of the danger，he still went skating on the thin ice. A. warning B. to warn C. warn D. warned

18. While building a tunnel through the mountain，________． A．an underground lake was discovered B．there was an underground lake discovered C．a lake was discovered underground

D．the workers discovered an underground lake

19．____ the general state of his health，it may take him a while to recover from the operation．

A．Given B．To give C．Giving D．Being given

20. Of the 2000 stock investors _____ last month, 90% were found ________ in financial knowledge.

A．surveyed；lacking B．having been surveyed；to lack C．surveyed；lacked D．to have been surveyed；lack