Since production has risen ________, the personal income has increased year by year.

. The English magazine is _______ easy; I can go through the articles without much difficulty.

—— How did you find your visit to the museum? —— I thoroughly enjoyed it. It was＿＿＿＿interesting than I had expected. 

Save water as ___ as we can.

 A Korean survey shows that shopping cart handles are the most bacteria-carrying items among some ________used objects.