What a nice day! How about the three of us ______ a walk in the park nearby?

I＇ve never been to Lhasa, but that＇s the city ______.

There ought to be less anxiety over the perceived risk of mountain climbing than ______ in the public mind today.

It is not so much the language ______ the cultural background that makes the book difficult to understand.

Fat cannot change into muscle ______ muscle changes into fat.

Professor Johnson is said ______ some significant advance in his research in the past year.

The three men tried many times to sneak across the border into the neighbouring country, ______ by the police each time.

After ______ seemed an endless wait,it was her turn to enter the personnel manager＇s office.

______ at in this way, the present economic situation doesn＇t seem so gloomy.

Firms that use computers have found that the number of staff ______ is needed for quality control can be substantially reduced.

All of us would have enjoyed the party much more if there ______ quite such a crowd of people there.