He is __________ unusual inventor and he invented _________ useful invention.A. a; an B. a; a C. an; an D, an; a
My cousin ____ the chance of working abroad and returned to his hometown.
– A number of students ________ in the dining hall. -- Let me count. The number of the students ________ about 400.
--- I won’t have time to go shopping with you this afternoon. --- But you ______ me yesterday.
Now the water in the river has ____ and we should ____ money to repair the broken bridge.
Yesterday he was walking _____ the police station when a plane flew _____ his head.