If you plant a tree,it ..........the world to breathe
helps-will help
If it.............tomorrow,I will go for a walk
doesn`t rain
won`t rain
find the mistake
Don`t worry if I was late tonight
If he will be sick,he had better go to bed
If it stops snowing,the plane wouldn`t be able to take off
If you are reading this book now,you`d enjoy it
It`s raining hard.We get wet if we go out
work before 3 o`clock
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