_____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.
168. Read the ______ on the box carefully before you take the medicine.
167. Which of the following words does not belong to the same category? _____
166. As we all know, _____ is very famous for its software industry though it is a developing country.
165. In America, the teen-age crime is on the _______. This is what the American public worry most.
164. Some people here don't work hard but they get a good _______ from their investments.