ОЧЕНЬ Какой вариант вставить? Chose the right preposition.

You need to back _ your important files.

on
down
up

backup

Объяснение:

1. up,up 2.on,to 3.to,in 4.on,to 5.of 6.with 7.in 8.with 9.on 10.in 11.on.

to speak english (7-a)

to enjoy holidays (6-b)

to stay in britain (1-c)

to see you again (5-g)

to miss friends (2-d)

to get an invitation ( 4-e)

to teach girls an boys (3-f)