Preparation for war:

destroys confidence
was an advantage of the United States in 1941
was a disadvantage of the United States in 1941
prevents attacks

the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.

osaka, a gorgeous place to live, extraordinary sights, and a wonderful place to visit for vacation. watching nature change there it is a lovely experience i would like.

explanation:

i ain't gonna write your whole essay for you at least you have a starter

sorry i ain't gonna do the whole assignment for your class or whatever