The mayor of Beijing says that all construction work for the Beijing Olympics _____ by 2006

This is not what I ____ him to say.

After several sleepless nights, Mr. Smith ______ a perfect solution to the problems.

Mother’s Day is coming. Here is a pair ofjeans for you, Mum. — ______ beautiful blue jeans!Thank you, Amy.

It is wise of you towell trained workers for untrained ones in your workshop. A．substitute B．changeC．exchange D．employ