First conditional: Select the answer.
Robby won't go to school if he isn't / won't be well.
Robby won't go to school if he isn't well.
If it snows, we . . . . . (make) a snowman.
If it snows, we'll make a snowman.
You shouldn't / mustn't use your cell phone while you are driving.
You mustn't use your cell phone while you are driving.
You should / must go to the theatre when you are in Vienna. It's great!
You should go to the theatre when you are in Vienna. It's great!
You should / shouldn't cross the street only when the lights are red.
You should cross the street only when the lights are red.
If Fiona invites me, I / I'll go.
If Fiona invites me, I'll go.
If I . . . . . (see) Steve, I'll ask him about the tickets.
If I see Steve, I'll ask him about the tickets.
If there's a fire, one shouldn't / mustn't use the elevator.
If there's a fire, one mustn't use the elevator.
We shouldn't / mustn't forget her birthday again, or else she'll be very hurt.
We mustn't forget her birthday again, or else she'll be very hurt.
The teacher said to me, "You should / must get up earlier so as not to be late."
The teacher said to me, "You should get up earlier so as not to be late."
If I don't pass the test, I'm not / I won't be happy.
If I don't pass the test, I won't be happy.
We . . . . . (not go) to the cinema if there's a good film on TV.
We won't go to the cinema if there's a good film on TV.
We must / mustn't hurry. I don't want to be late again.
We must hurry. I don't want to be late again.
My mum thinks I needn't/ shouldn't spend so much money on clothes.
My mum thinks I shouldn't spend so much money on clothes.
The doctor told Charlie that he mustn't / shouldn't drink too much alcohol.
The doctor told Charlie that he shouldn't drink too much alcohol.
You / You'll arrive on time if you leave now.
You'll arrive on time if you leave now.
If Diana works hard, she . . . . . (finish) her project this evening.
If Diana works hard, she'll finish her project this evening.
You shouldn't / mustn't eat in bed. It's one of mum's policies that can't be broken.
You mustn't eat in bed. It's one of mum's policies that can't be broken.
"Twilight" is a really great book. You must / should read it.
"Twilight" is a really great book. You should read it.
Young children mustn't / shouldn't be left home alone.
Young children shouldn't be left home alone.
Ella will call us if there's / there'll be a problem.
Ella will ca us if there's a problem.
If Eddie . . . . . (not play) rugby, he'll watch the game instead.
If Eddie doesn't play rugby, he'll watch the game instead.
You should / must talk to the teacher if you need further information about the trip.
You should talk to the teacher if you need further information about the trip.
You shouldn't / mustn't drive a car. You are only 13!
You mustn't drive a car. You are only 13!
You mustn't / shouldn't tell lies.
You mustn't tell lies.