Without the help of people from every corner of the world, people in Wenchuan County, Sichuan Province__________recovered very quickly from the May Twelfth Earthquake.
A、must not have
B、couldn‘t have
C、may not have
D、can‘t have
According to the passage, it is believed that "Flores Human"__________ .
A、was dwarfed by its enemies
B、could use language
C、left a lot of fossils in the hot and wet environment
D、reached Flores 40,000 years ago
The function of the first sentence in this passage is to __________ .