Matching up the Expressions and Definitions

• to convert itself – to change from one thing to another
• to serve needs – to satisfy people’s desires or requirements
• labor input – manual work
• to stumble on – to discover something by accident
• to be dubious – to be uncertain, disbelieving

Extracted From

MacKenzie, I. (2002). English for Business Studies: A course for Business Studies and Economics students (2nd ed.). Cambridge University Press.