Ответ:

1

1in

2at

3in

4on

5in

6on

7on

8on

9in

10at

Объяснение:

2.

at, on, in, at, on, in, on.

4.

from...to

after

until

before

during

5.

1. on вместо in

2. at вместо during

3. on вместо at

4. in вместо on

5. at вместо to

6. in вместо on the