A l'aide des éléments donnés réecrivez les phrases en formant des comparatifs de supériorité (+) d'infériorité (-) d'égalité (=) ou d'inégalité ( not =) :
a.Normal houses are (- healthy) /'' green houses''.
Normal houses are less heathy than "green houses".
b. Gas is (=expensive) / oil.
Gas is as expensive as oil.
c. Years ago, the situation was (+bad) / now.
Years ago, the situation was worst than now.
d. In the past, climate change was (not = fast) / nowadays.
In the past, climate change wasn't as fast as nowadays.