1 . The USA was originally made up of ________（settle) from Britain and other countries, organized into thirteen British colonies.（所给词的适当形式填空）

2 . Many important figures in the music world started making ________ (预测) about Beethoven’s extraordinary future.（根据汉语提示单词拼写）

3 . Our freedom to doubt was born out of a deep and strong struggle against _________(权威) in the early days of science. （根据汉语提示单词拼写）

4 . Some people make the______(假设)that English can be improved within a short time, which contradicts the basic principle of language acquisition. (根据汉语提示单词拼写)