We watched __________ when he cleaned and repaired the laptop computer.
.In this university a medal with ten thousand dollars_________gains success in science and technology every two years.
.If the launch is successful this year,China will be the third country_________its astronauts into space.
— Why weren’t you at school yesterday morning,Li Lei? —_________,sir.
The thing that_________ is not whether you fail or not,but whether you try or not.
— Why not take my car to the museum instead of walking?— No,thanks. _________.