Open the brackets using Present Perfect.
_______ the students ________ (improve) their English?
She ________ (become) really beautiful.
_______ this man ________ (invent) many useful gadgets?
People ________  (cause) much destruction to the planet.
I ________ (never surf) in the Pacific Ocean.
The class ________ (do) 5 tests this month.
Allison ________ (find) a few problems with your plan.
_______ you ________ (consult) with doctors about his illness?
I ________ (not meet) Debbie for ages.
Since previous year, we ________ (not make) any profit.
She ________ (be) sick since Sunday.
You ________ (be) away for 2 weeks.
_______ he ________ (hate) cheese since childhood?
Mark and Katie ________ (not be) together for two years.
I ________ (like) mango since my last trip.