Does Bob go to work __________bus or __________foot?[ ]

What a beautiful city our hometown is! There are many trees ___________ of the road! — Yes, and ____________ of the trees is growing larger and larger.

Oh, there is someone knocking at the door. — __________ must be your neighbour, Mrs Black.

Don’t talk. Your brother _______.

They were_______ busy_______ with each other__________ the time.[ ]