Cook was a strict but good captain, _________ who, usually, took care of the sailors on his ship.
The WTO urged that all the countries ________ measures to prevent swine flu spreading.
Frank put the medicine in a top drawer to make sure it would not be ______ to the kids.
Nowadays people sometimes separate their waste to make it easier for it _______.
Life is like a long race ________ we compete with others to go beyond ourselves.
You must be ________ that what you are doing is quite illegal.