Rewrite the sentences with if or unless in the brackets
1/ He might fail the exam unless he tries harder ( if )
2/You can't take my camera unless you promise to look after it ( if )
3/It won't be the same unless you come with us ( if )
4/If you don't know the answer, don't say anything ( unless )
5/ Sam's parents will be worried unless he call them ( if )
mình làm bài này như sau:
1/=>He might fail the exam is he doesn't try harder
2/=>You can't take my camera if you don't promise to look after it
3/=>It won't be the same if you don't come with us
4/=> Unless you know the answer, don't say anything
5/=> Sam's parents will be worried if he doesn't call them
Mình làm bài này tạm thời là như vậy .Các bạn xem có đúng không . Nếu mình làm sai mấy bạn sữa giúp mình nha 
Rewrite the sentences with if or unless in the brackets
1/ He might fail the exam unless he tries harder ( if )
if he doesn't try hard, he might fail the exam
2/You can't take my camera unless you promise to look after it ( if )
if you don't promise to look after my camera , You can't take it
3/It won't be the same unless you come with us ( if )
if you don't come with us , It won't be the same
4/If you don't know the answer, don't say anything ( unless )
unless you know the answer, don't say anything
5/ Sam's parents will be worried unless he call them ( if )
if Sam doesn't call his parents , they will be worried
