_______ jeans were invented over 100 years ago, they're still in fashion today.
He will send me an e-mail as soon as he _____ in America.
In the street I met the professor______ gave us a talk last week.
Paul doesn’t have to be made _______ . He always works hard.
—Would your brother go for a picnic this Sunday?—If I don’t go, _______________.
I must return the book to the library. I _____ it for one week.