Question 8 to 10 are based on the following news item. At the end of the news item, you will be given 10 seconds to answer each question. Now listen to the news. Isreali troop near border with Gaza has ______.

A．because grasses that made up the thatched roof of the dwelling were still new, that the structure was recent
B．he left the site, located northwest of San Salvador, the capital, in 1980 unwillingly
C．by sending radar signals through the ground in order to detect buried objects, he located 22 additional structures still buried in ash
D．when the teeth were found, he said that throwing teeth on the roof is a tradition still practiced by some people in rural El Salvador today