There was a big dog ______ in front of Mr. Hill’s house, so David didn’t dare to go near it.
with the size of the whole earth, the highest mountain doesn't seem high at all.
He___________ when the bus came to a sudden stop.
—What would you wish to do if you were a college student again? —That's very hard to say, but I wish I when I was a college student.
His parents meant him_____________ scientific research, but he showed no interest and turned poet.
—Why didn't you answer my phone when I phoned you at about 11 p. m. yesterday? —I ___________and failed to hear the phone.