He started to learn English in 1990 and in the years ________ he kept on using it in his work.
I’ll never trust such a man ______ you described.
A NASA experimental jet , the X-43A,flew at a world –record speed ---11,260 kilometres an hour on November 17.This speed is __ as that of sound.
On ____ the accident, he felt frightened.
I won’t see the film tonight. I am busy. ____ , it is raining cats and dogs.
Computers ____ in offices and homes since 1970s.