Scientists are racing________time in order to find a cure for bird flu[ ]

Although Ms Zhou is an old lady, she is always in the pink.—- Yes. Because she exercises every day and eats a balanced diet.

Their problem today is somewhat similar to_____ they faced many years ago.

A lot of things ________ in Oxfam shops, _________ books.

This magazine ______ out _____ the morning of March 1st.