-- I rang you several times yesterday, but couldn’t ______ . -- I’m sorry, but my phone didn’t work.
Scientists say it may be five or ten years___________ it is possible to test this medicine on human patients.
Neither of them knew what_____ was doing.
The murderer was brought in, with his hands _____behind his back.
--" Would you mind the window? It's hot here!" May said. --"__________. "Tom replied.
--Hi, Tracy, you look tired. --I am tired. I__________ the living-room all day.