_长沙成考网

56 （）

Dinosaur scientists can probably know whether dinosaurs were good parents by __________ .

• A、watching many kinds of animals 

• B、studying dinosaurs' living relatives

• C、following the tracks left behind

• D、working on dug-out dinosaur eggs

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