2. Before I decide to buy the house, I will have to look at an expert.
3. Until she is a little older, we will not let her walk to school alone.
4. Unless he works more seriously, he won't fail taking his exams.
5. In case one pen runs out, I will take two into the exam room.
6. If I see you after school, I will meet you outside to watch cinema at 8:00.
7. Provided, the traffic is not too bad, I will pick you up after work.