________ material used for running tracks in schools across China may be ________ danger to children's health.
| A．/；a | B．The；a | C．/；the | D．The；the |
262. Sorry, I didn’t make a call to you because I forgot your telephone number. I should have _____ in my notebook.
| A．dropped in it | B．put it down | C．dropped it in | D．put down it |
261. The players of China won 150 gold medals in Pusan Asain Games of 2002. Our players _____ to be very great.
| A．are proved | B．did prove | C．were proved | D．was proved |
260. The lazy boy pretended ______ homework when his parents came to check him.
| A．doing | B．to be doing | C．to do | D．to doing |
259. At present, what _____ most heavily on American people is the terrorist accident(恐怖事件).
| A．hit | B．pressed | C．beat | D．Stroke |
258. As soon as the principal ______ the news on the bulletin, the students began gathering in the school garden.
| A．mailed | B．sent | C．posted | D．Handed |