He doesn’t have the habit of planning his travel expense, so he won’t know what to do _______ the money runs out.

A. once              B. before                    C. unless                   D. though

He doesn’t have the habit of planning his travel expense, so he won’t know what to do _______ the money runs out.

1. A.
   once
2. B.
   before
3. C.
   unless
4. D.
   though

He doesn’t have the habit of planning his travel expense, so he won’t know what to do _______ the money runs out.

A. once            B. before                 C. unless                D. though

He doesn’t have the habit of planning his travel expense, so he won’t know what to do _______ the money runs out.

A. once              B. before                    C. unless                   D. though

He doesn’t have the habit of planning his travel expense, so he won’t know what to do _______ the money runs out.

A. once            B. before                 C. unless                D. though