1) He is very slow, so we won't give his such an important task.
-> If..............................................................................................
2) If you don't promise to try harder, i won't help you
->Unless.........................................................................................
3) If didn't win a big prize in a lottery, i wouldn'tgive up my job
->Unless.......................................................................................
4) Bill failed the test because he didn't study carefully
->If...............................................................................................
5) The dress is very expensive, so she can't but it
->If..................................................................................................
6) She wasn't able to answer the questions, so she failed the exam
->If.......................................................................................................
7) If he doesn't study hard, he won't get good mark
->Unless................................................................................................
8) He doesn't get a job, so he can't pay his bills
->If........................................................................................................
9) Save your money or you won't be able to buy the house
->If...........................................................................................................
10) We missed the train because the clock wasn't right
->If.............................................................................................................