What does your mother ________?—She is of medium build with long straight hair.
Li Yundi began to learn the piano _____ the age of four and took part _____ the 14th Chopin International Piano Competition in 2000.[ ]
The students in our class school very early every day.
Is this_____football, boys?——No, it is not.
. — Why were you so late for work today? — ____ to the office was not very easy this morning because of the traffic.