1 . 根据句意，选择单词或短语并以其适当形式填空。

declare war on, make a great breakthrough, much to one’s astonishment, be identical to, a sequence of, throw oneself on, bring back to life

1. America ________ (美国向日本宣战) Japan in 1941.
2. China has ________ in outer space exploration.
3. ________(使我们非常吃惊的是), the plan succeeded.
4. The copy ________ the original; we can’t tell them apart from each other.
5. ________ changes happened in this country after the crisis.