The crime scene will be contaminated if you don’t wear the correct clothing. PROVIDED - ______ correct clothing the crime scene won’t be contaminated.

If the burglars ________ us enter, they’ll make for the back door. (hear)

The burglar may try to escape down Park Avenue, so establish a road block there. CASE - Establish a road block on Park Avenue, ________ to escape that way.

The crime prevention team ________ a success as long as we give it our full support. (be)

If you __________ on holiday, be sure to take out travel insurance before you leave.

If they reduce the number of police officers, crime rates _______. (increase)

You have nothing to worry about, provided you _______ where you were on the night of the crime. (prove)

If the crime lab doesn’t produce any evidence, we cannot hold the suspect any longer. UNLESS - _________ some evidence, we cannot hold the suspect any longer.

The vandal won’t be arrested _____ we catch him in the act. as long as/in case/unless

I’ll give you the new crime rate figures if you promise not to publish them just yet. AS - _________ not to publish them just yet, I’ll you give the new crime rate figures.

Make sure you __________ (lock) all the doors and windows in the house if you go on holiday.

If a witness _________, he’ll get away with it. (not come forward)