– I wonder how much you charge for your services. -- The first two are free ____ the third costs $30.
Turn on the television or open a magazine and you ________ advertisements showing happy families.
. Sales of CDs have greatly increased since the early 1990s, when people ________ to enjoy the advantages of this new technology.
The city is built _____ two rivers come together.
You are wanted ___ phone.
The house is lighted ____ electric light.