He, a Nobelist, made great ______________ to researching in this area.
—Can you give me the right answer?-─Sorry I____________ .Would you repeat the question?
She is not __________ to pass the examination as she doesn’t work hard.
___________ the guide, the reporter entered the house of the farmer who is famous forhelping other villagers get rich.
You’d better go there by train. The train ticket is __________the airplane ticket.
—Shall I give you a ride as you live so far away?—Thank you,____________.