Choose the best answer to complete the questions

1. We ______________ this computer for over ten years
. A. have used B. were using C. used D. are using
2. Traditionally, the Ao dai ______________ by both men and women.
A. frequently wore B. was frequently worn C. was frequently wearing D. has frequently worn
3. Your sister works in a foreign company, ______________ she?
A. isn‟t B. didn‟t C. wasn‟t D. doesn‟t
4. As soon as he ______________ a certificate in English, he will apply for a job.
A. would get B. got C. gets D. will get
5. She has worked as a secretary ______________ she graduated from college.
A. before B. since C. while D. until