---______, is this your pencil? -----Yes, it is.
I am waiting for my friend. , I will go swimming alone.
Would you mind me how this physics problem ?
He is so careless that he often his school things at home.
—I think Mr Zhang may be in his office. —No, he be there. I saw him just now.
—What do you think of the new bridge? —I have never seen _____ before.