—Who called me this morning when I was out?—A man calling ________ Robert.
Baseball requires teamwork _______ tennis is an individual sport.
--- I like football.---______ my sister and me.
If water becomes increasingly scarce in decades ______, water shortage will become a hot issue all over the world.
However weak we are, we can still do something against the powerful nature as long as we are ______ prepared.
It is his cleverness, not his strenth, ____ defeated his rival.