I'm not sure when he will be back. vs I don't know exactly.

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hello everybody,

Our boss has gone to abroad last week. A guest asked me when he will be back.
Because I don’t know, I answered like this:

  1. I’m not sure when he will be back.
  2. I don’t know exactly.

Which one is the correct answer?

Many thanks.

2

Both are fine.

3

Natasha thanks,

I’ve learned more from you.

Bye,

4

NOTE: Don’t write, “…gone to abroad…” or “gone to away”. The “to” is reserved for definite spots, such as “to Mexico” or “to the washroom”.

5

Lance,
I saw your couple of suggestions. I like all them and always gives technical clarifications.
Keep it up

6

Many thanks for Lance.