—Please ______ us in the discussion.—I'd like to,but I'm ______busy at the moment.
It is believed to _____ over by sandstorms from AD 200 to AD 400.
Many people are not fully aware of the damage that it does to their health. This is ____ we chose this picture as our logo.
We want to shock people into ____ that many smokers die all too soon from illness and diseases _____ smoking.
George Gould too visited the tomb, ____ a high fever the next day.
The best times to visit Shangri-la are spring and autumn ___ the temperature is at its mildest.