Sentence & summary completion

Read the extract and complete each sentence with words taken exactly from the text. Never exceed the word limit — an over-long answer scores zero even if the meaning is right.

1. 1

   EXTRACT: 'The first commercial refrigerator ran on toxic gases, so early models were kept outdoors. In 1926 a safer chemical coolant was patented, and within a decade fridges appeared in ordinary kitchens. Sales tripled during the 1930s.' — Early refrigerators were placed ______ because of dangerous gases.

2. 2

   A ______ was patented in 1926. (TWO WORDS)

3. 3

   Fridges reached ordinary kitchens within ______.

4. 4

   Sales ______ in the 1930s.

5. 5

   Limit is NO MORE THAN TWO WORDS. Which answer is safe?

   a very safe chemical coolantchemical coolantthe safer chemical coolant that was patented