We’ll take a honeymoon trip to Venice. Would you like to            my dog for me while we are away?

The operation room in every hospital has to ______ bacteria of any kind.

________ different life today is ________ what it was 20 years ago!   

While in university, we were offered a number of afterschool activities to _____ our social skills．

The dictionary published by Oxford University Press recently has really ______ because it is of great use to the learners of English.