The demand for _____ skilled workers is still increasing.

Interviews were carried out ________ over the telephone，via e－mail or fax or face to face in four cities including Beijing，Shanghai，Guangzhou and Wuhan.

The incomes of skilled workers went up. ______, unskilled workers saw their earnings fall.

I wasn’t blaming anyone: I ________ said errors like this could be avoided.

The opening ceremony of the 29th Beijing Olympic Games was _____ that everybody was greatly impressed_____ it.