Three fourths of the surface of the earth ______ covered with water.
---Where is the nearest hospital? --- Not very far. It is _________.
---Are you going to Tom’s birthday party?--- _______. I might have to work.
We have no other ways but ______ here for him to come.
The traffic rule says that the children ______less than 40 pounds and under the age of four must be in a child safety seat.
The Gate of Fortune, from _____ top tourists can enjoy a wonderful view, has attracted lots of visitors.