Present perfect
Future perfect
Modal verbs
Should
To be going to
100



The boy sitting next to me on the plane is nervous be¬cause he__before.

Has not flown

100

I have never ...( fly) a pilot

Flown

100

Student take.... exams twice a year

Must

100

You... take an aspirin

Should

100

Kate has got sarious problem.She ... (to visit)a lawyer.

Is going to