---You return those books to the library immediately, you will have to pay a fine._
举一反三
- _____ you return those books to the library immediately, you will have to pay a fine. A: If B: Unless C: As long as D: Whenever
- You will have to pay a fine _____ you return those books to the library immediately. A: If B: for fear that C: Lest D: unless
- _____ you return those books to the library immediately, you’ll have to pay a fine. A: Until B: Unless C: If D: Provided
- 26._____ you return those books to the library immediately you will have to pay a fine. A: Unless B: If C: Until D: Provided
- I’ll lend you these books as long as you (return) ______ to the library in time.