Idioms nominal in nature have a(n) ______ as the key word in each and function as a noun in sentences.

—David has made great progress recently. — _______，and _______.

Agoodworkerinakeyspotcould,so_______ashekeptupproduction,takeallthecoffeebreakshewanted.

Parents, teachers in schools and communicators in or using the mass media are all capable of ________ our potential interests.

Youshouldhelpthem________whenyourfriendsquarrelwitheachother.