An idea came to him ___ he might do the experiment in another way.
31.The company had about 20 notebook computers but only one third _______used regularly . Now we have 60 working all day long.
The young girl sitting next to me on the plane was very nervous.She ______before.
. –Is there anything wrong , Bob ? You look sad . --Oh, nothing much. In fact ,I _____of my friends back home .
-- Did you see a man in black pass by just now ? --No , sir. I _____a newspaper .
Danny _____ hard for long to realize his dream and now he is popular.