Fortunately somebody who happened to be passing by called the fire department ______ the fire broke out.
Human facial expressions differ from those of animals in the degree __________ they can be controlled on purpose.
Chan’s restaurant on Baker Street, __________ used to be poorly run, is now a successful business.
Those successful deaf dancers think that dancing is an activity __________ sight matters more than hearing.
It is reported that two schools, __________ are being built in my hometown, will open next year.
Today, we’ll discuss a number of cases __________ beginners of English fail to use the language properly.