Rewrite the following sentences without changing their original meanings.
1. Someone has stolen by bicycle.
➩ My bicycle __________________________________________________.
2. If he doesn't work hard, he will not pass his exam.
➩ Unless ______________________________________________________.
3. I don't have free time, so I can't go some where.
➩ If I _________________________________________________________.
4. Vy ate a lot last night, so she had a stomachache.
➩ Because _____________________________________________________.
5. My mother had gone to work before I got up.
➩ After _______________________________________________________.