다음을 보고, 알맞은 단어를 넣어 문장을 완성하세요. Look at the following and fill in the blanks with the correct words to complete the sentences.
WORDS IN USE
economy
economist
tour
tourist
science
scientist
hope
hopeless
care
careless
sleep
sleepless
-ist
-less
Jack is interested in how people spend money and wants to be an economist .
I was careless and broke the glass while I was cleaning.