—Bill, don’t eat in the classroom.             —_______.

— Would you like to go hiking with me, Susan?—I’d like to, _______ you don’t want to go alone.

—______ does your mother go for a walk？ —Every afternoon.

Liu Xiang runs ________ fast ________ no one can catch up with him.

The policeman is still not sure ______ the young man killed himself or was killed.