BÀI 1 VIẾT LẠI CÂU VỚI TỪ CHO TRONG NGOẶC 
1 if it rains tomorrow,we will stay at home. (Unless)
2 if walter gets the job ,he can earn a lot of money. (Should)
3 if it doesn't rai this afternoon,we will play soccer. (Unless)
4 if i see emily,i will give her the book.(should)