One of the greatest benefits of Internet friendships is that they are based on common interests, ________ appearance, age or popularity.

We don’t have to keep these old chairs any more. ________, they are falling apart（支离破碎）.

Jack has a good habit of keeping a diary every day;      he is very good at writing.

 As a scientist, Madam Curie devoted herself ________ to her research and that was why she was given two Nobel Prizes.

It's ___ so easy as you imagine.