Question

tell me please it's very urgent ​

Answer 1

Answer:

1. since 2. for 3. since.

i guess it help you

Answer 2

Explanation:

we will use 'for' for a period of time like 4 years etc.

and

'since' for a specific point of time like since 2004,since morning etc.

1. since

2. for

3. since