Ex. 12. Open the brackets:
1. I’ll see you off if (have enough time). 2. I’ll talk to him as soon as (come home). 3. He will understand everything when (know all the facts). 4. I’ll wait till (receive the letter). 5. They’ll stay in Moscow till (all the places of interest). 6. I’ll buy a new coat when (get some money). 7. He’ll see his parents before (leave for Moscow). 8. You’ll recognize him if (see his photo). 9. You’ll make a mistake if (not believe me). 10. I’ll let you know if (want to see you again).