Things are ________ on Mars ________ on Earth because of the different gravity.

_______ do you go to the English club?Once a week.

When were you born, Lily? —I was born _______ July 18, 1990. [ ]

There is nothing in the world ________ can make him give up his dream.

We don’t care if a hunting dog smells _______, but we really don’t want him to smell _______.