The river smells terrible.People must ________dirty things into it.[ ]

There is a police car in front of the house of our neighbour’s. _____ do you think _____ ？

The police are looking for the witnesses,__________ words will make a difference to the victim.

Simon, what do I need to take for the hiking –You’d better ________ more water than usual. It’s hot today.

Who do you guess I am —Sorry, your name ____ my mind.