1. Provided that circumstances permit, we shall hold the meeting next week.
    ____ ____ ____ circumstances permit, we shall hold the meeting next week.
2. If you work hard, you are sure to pass the exam.
    If you work hard, you ____ ____ ____ pass the exam.
3. Custom officers are making spot check on incoming cars.
    Custom officers are ____ ____ spot check on incoming cars.
4. The 4:26 train has been cancelled because of an accident.
    The 4:26 train has been cancelled ____ ____ ____ ____ an accident.
5. My friend that I mentioned last night is 2 years younger than you.
    My friend that I mentioned last night is 2 years ____ to you.
6. He seems unable to kick off his bad habits.
    He seems unable to ____ ____ his bad habits.