Задание 
Read the sentences and choose the correct variant.
- I am ____ loss, I don't know what to do.
- by
- at
- for
- in
- The President will be in evidence ____ the Senate Committee.
- before
- during
- after
- in
3. We will know everything ____ he comes.
- before
- at
- in
- during
- ____ the end, everything was fine.
- At
- By
- In
- On
- Is there anything interesting _____ the paper today?
- at
- within
- on
- in
- We are offering solutions _____ a price almost anyone can afford.
- in
- on
- at
- by