What ... they ... (do) if they miss their flight?
will (they) do
Students don’t have to / mustn’t use their phones during the lesson.
mustn't
I love that restaurant – the meals are delicious and the waiters are very efficient / predictable.
efficient
If I ... (not have to) work today, I would go to the beach.
didn't have to
The lights go out / went out / goed out / were going out suddenly while Jason was cooking.
went out
Which film will you see / are you going to see this evening?
are you going to see
Sam finish / is finish / does finish / finishes school early on Wednesdays.
finishes
A sensible person makes good decisions / feels sad very often / isn’t afraid.
makes good decisions
Where have they gone / did they go / are they going to go last weekend?
did they go
A high temperature / An upset stomach is a common symptom of flu.
A high temperature
I didnt't see / not saw / was seeing / didn't saw a musical while I was in New York.
didn't see
He won’t listen / didn’t listen / wasn’t listening when the teacher gave the instructions.
wasn't listening
This article will help you with your science project. You should / can read it.
should
I’m sure the exam won't be / isn't going to be difficult.
won't be
Naomi plays / is playing / played the piano at the moment.
is playing
Many doctors recommend running away / working out / keeping quiet at least half an hour every day.
working out
Burglary is a crime what / which involves illegally entering someone’s home.
which
Eating tasty / raw meat can be dangerous to your health.
raw
I won’t understand / didn’t understand / don’t understand this question. Can you explain it to me?
don't understand
Wait a minute! I will carry / am going to carry the bag for you.
will carry
Why does the teacher take / is the teacher taking / is the teacher take / the teacher takes a break now?
is taking
The robbers broke into the judge / jury / bank last night.
bank
We are having / have / have had three tests since Monday.
have had
A rude person isn’t lazy / outgoing / polite.
polite