语法填空
（1）Scientists have responded by __noting__ (note) that hungry bears may be congregating(聚集) around human settlements, leading to the illusion(错觉) that populations are ________ (high) than they actually are.
（2）That makes her baby scream, and then a 400-pound male appears. He screams the________(loud) of all.
（3）The birth rate in the 21st century may be much ______ (low) than it was in the 20th.
（4）As 65(a) result, people will eat more food to try to make up for that something missing. Even _____ (bad), the amount of fast food that people eat goes up.
（5）The central London Railway was one of the most ________(success) of these new lines, and was opened in 1900.