Question

1. past simple or present perf. simple?
how many times (you/try)...... to pass your driving test?
when(you/go) to rome?
i(not/see).........david at all this week
you look different(you/have) a haircut?
(you/speak)........to john yet?
my sister(be)... to the nw york 
the us president (visit). our country

Answer 1

How many times have you tried  to pass your driving test?
When have you beed to Rome ?
I didn't saw David at all this week.
*Aici cred ca ai scris gresit pentru ca nu prea inteleg, dar daca ar fi sa pun este :
You look different. Have you got a new haircut?
Have you spoken to John yet ?
My sister has been to the New York City.
The U.S. president has visited our country.