--- What are the workers talking about ?--- They are discussing the idea the old worker ______ at the meeting yesterday.

People exposed to radiation are more _______ to suffer from certain forms of cancer, which can be ______ but can’t be ______at present. 

I _____ some knowledge of cooking just by watching my mother doing it.

–The house ____ fire and was destroyed.--Who ____ fire to the house?

Many road accidents occur because drivers cannot ______ the speed of approaching vehicles.