The buses are driving (a)   Big Ben.

The businessman is falling (a)   the steps.

The couple are cycling (a)   the river.

The children are running ... the road.

(a)  

The teens are jumping ... the pool.

(a)  

The family is dancing ... a tree.

(a)  

The children are running (a)   the school.

These people are walking ... the steps.

(a)  

The bird is flying ... the window.

(a)