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
act
actor
invent
inventor
visit
visitor
invent
invention
solve
solution
direct
direction
-or
-tion
Thomas Edison was a famous inventor .
She knew the solution to the problem.