—Mr. Li ______ to Mary carefully when I entered the classroom this morning. —He is very patient ______ he is young.
I do not doubt ________ win in the race.
--- Do you know much about the city? --- Yes, I ___________ there three times.
Why not ______ your teacher for advice when you don’t know ______ the problems?
--- Didn’t your brother ________ go to school by bike? --- Yes, he did. But he ________ walking to school now.
You don’t know _____ I want to see you again. It’s a year since I last saw you.