A number of major roads combine to provide the basis for the metro infrastructure.

An increasing number of people are now combining holidays with language study in the native country.

A number of factors combined to explain why this was the case prior to 1959.

A number of factors combine to make this a particularly dangerous strait.

A number of legal and extra-legal factors combine to produce this result.

A number of factors combined in us not coming up with the goods on the day.

A number of factors have combined to create the current atmosphere.

A number of factors have combined to slow Congress' work.

A number of factors combined to give rise to these market conditions.

A number of factors combined to produce a very positive relationship between the research, the researchers, and the team.