You will find this map of great ________ in helping you to get around Beijing.

_____ in a heavy rain, the teacher fell ill and couldn’t but ______ for a leave.

Mr. Richard hasn’t got any time to play golf these days, because he is ______ in the research of bird language.

The money spent on healthcare for people aged over 60 ________ 41 percent of the total spent last year in China.

The football match, originally due to be held last Sunday, was finally _______ because of the bad weather.

Steve wanted to play a trick          Tom, but gave himself          by laughing.

Most experts agree that human activities such as the clearing of large areas of forests, and farming on a large scale _________ the problem of global warming.

Varieties of programmes in the TV station ________ many different types of interest and taste among the public.  

People believe that we ______a special ability to learn language and that our brain _____ itself to the language we hear.