anglais

   As its sales of computer products have surpassed those of measuring instruments, the company has become increasingly willing to compete for the mass market sales they would in the past have conceded to rivals.

•    they would in the past have conceded to rivals

•    they would have conceded previously to their rivals

•     that in the past would have been conceded previously to rivals

•    it previously would have conceded to rivals in the past

•    it would in the past have conceded to rivals

   Salt deposits and moisture threaten to destroy the Mohenjo-Daro excavation in Pakistan, the site of an ancient civilization that flourished at the same time as the civilizations in the Nile Delta and the river valleys of the Tigris and Euphrates.

• that flourished at the same time as the civilizations

• that had flourished at the same time as had the civilizations

• that flourished at the same time those had

•    flourishing at the same time as those did

•   flourishing at the same time as those were

    For members of the seventeenth-century Ashanti nation in Africa, animal-hide shields with wooden frames were essential items of military equipment, a method to protect warriors against enemy arrows and spears

•   a method to protect

• as a method protecting

• protecting

• as a protection of

• to protect

   Warning that computers in the United States are not secure, the National Academy of Sciences has urged the nation to revamp computer security procedures, institute new emergency response teams, creating a special nongovernment organization to take charge of computer security planning.

•    creating a special nongovernment organization to take

• creating a special nongovernment organization that takes

•   creating a special nongovernment organization for taking

•   and create a special nongovernment organization for taking

•    and create a special nongovernment organization to take

In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.

• due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing

• due to moisture that tourists had exhaled, thereby raising its humidity to such levels that salt from the stone would crystallize

• because tourists were exhaling moisture, which had raised the humidity within them to levels such that salt from the stone would crystallize

• because of moisture that was exhaled by tourists raising the humidity within them to levels so high as to make the salt from the stone crystallize

• because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing