Exercise 77		Choose right answer
1.	If you _____ for so long,  you should be able to speak now.	a) study  b) are studying  c) have studied
2.	How long ______ on this project?	a) are you working  b) do you work  c) have you been working
3.	She _______ by the end of this year.	a) will graduate  b) will have graduated  c) be graduating
4.	If you _______ all the details, you wouldn't have problems now.	a) did  b) have done  c) had done
5.	I ____ my car _____ yesterday.	a) had/washed  b) have/washed  c) have had/washed
6.	When I applied for the job, they ____ the right candidate.	a) chose  b) have chosen  c) had chosen
7.	We _____ around our block of flats when we were kids.	a) used to run  b) ran  c) would run
8.	It ______ these days.	a) gets colder  b) get colder  c) is getting colder