It was in 1990 ______ the medicine was tested on human patients.
________ the book if you are free, and you will learn a lot about how to study English.
-- I' m still working on my project. -- Oh, you'll miss the deadline. Time is ________.
-- Do you have any clothes ________, sir? -- No, thank you.
Lucy has ________ all of the goals she set for herself in high school and is ready for new challenges at university.
For more than a decade, experts from across the globe ________ on the cure of the disease that way.