.In the rainforest of the Amazon, 50 to 150 plant species _____ every day.
He began to take political science___only when he left school.
Despite such a big difference in___towards what one eats,there is no doubt that people in the west regard the Chinese food as something special.
Water can absorb and give off a lot of heat without big changes in temperature,thus creating a___environment.
If we can___our present difficulties,then everything should be all right.
People try to avoid public transportation delays by using their own cars,and this___creates further problems.