He is __________ unusual inventor and he invented _________ useful invention.A. a; an B. a; a C. an; an D, an; a
Among those foreign guests are two_____, four______ and six______.
English people _________use “Mrs” before a woman’s first name
If they ________time, they__________the new factory tomorrow.
What are the students ________?
—What’s your mother? — __________________.