Tom, clean up the broken glass _________ someone walks on it.
My uncle’s house in the downtown area is much smaller than ours , but it is twice _______ expensive .
The questionnaire takes ______ ten to fifteen minutes to complete and can be used along with the assessment interview.
As there is less and less coal and oil, scientists are exploring new ways of making use of ______ energy, such as sunlight, wind and water for power and fuel.
Ten years ago the population of our village was ______ that of theirs.
Last night Mr. Crook didn’t come back at the usual time. ______, he met some friends and atayed out unitl midnght.