1. _______ basketball player who performs well comes from ______ European country.
A. The; a B.A; the C. The; an D. A; an
2. —Biology is my favourite subject.
—Mr. Green teaches __________ Biology, I guess. He teaches so well.
A. your B. you C. yours D. yourself
3. Check your car _________ you start your journey.
A. before B. though C. because of D. while
