1.When will Britain ___ Japan in industrial production?

D.catch up to

2.The album might have ___ had it been less expensive.

3.My reading in later life has supplied me with some possible explanations of his ___.

4.In the past, most foresters have been men, but today, the number of women ___ this field isclimbing.

5.People who live in small towns often seem more friendly than those living in ___ populated areas.

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