It is believed to _____ over by sandstorms from AD 200 to AD 400.
A. gradually cover B. be gradually being covered
C. have been gradually covered D. be gradually covered
Many people are not fully aware of the damage that it does to their health. This is ____ we chose this picture as our logo.
A. that B. because
C. why D. for which
We want to shock people into ____ that many smokers die all too soon from illness and diseases _____ smoking.
A. being realized; relating to B. realizing; related to
C. realizing; relating and D. being realized; related and
George Gould too visited the tomb, ____ a high fever the next day.
A. only to catch B. caught
C. being caught D. catching
The best times to visit Shangri-la are spring and autumn ___ the temperature is at its mildest.
A. where B. on which
C. when D. in that
You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.
A. in case C. unless
C. though D. as
