Scientists are trying to ____ out the ways to reduce pollution from aircraft.

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• He asked _______ to leave the office then. 

• Choose the correct answer in each sentence.

  Gelden Petrochemical exports products to deputy customers _____________   the world.

• Choose the correct answer in each sentence.

  The bus driver used a side street rather than the main highway,  _______________  avoiding rush hour traffic.

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• Unauthorized entry into the building is not permitted, ............... to guests who have obtained a special security pass.

• We request that she ____ the window.

• Choose the best answer:
  How many.................. were there in all?

• Choose the best answer A, B, C or D to complete the sentence.

  ____ robots are machines, there is no need for sleep.

• You are not allowed to drive_____the influence____alcohol.

•  _______ of them has been turned in stone. 

• The overall satisfaction of participants with the workshop is often based on ...................... unimportant details such as the ability to park close to the training facility

• Choose the correct answer in each sentence.

  New patients should arrive fifteen minutes before ________________   scheduled appointments.

• We’ ll hurry. We haven’t got ________time left. 

• Choose the correct answer in each sentence.

  As we expect to receive hundreds of applications for the position, please -------- your resume to two pages.

•  _______ of the students in my class could solve the problem yesterday.

• Choose the correct answer in each sentence.

  The video creators must have an acceptance by text  __________  use a corporate logo.

• Choose the correct answer in each sentence.

  Although they usually leave at 6:00 P.M, the employees are  _____________  in the store preparing for tomorrow’s big event.

• Choose the correct answer in each sentence.

  Members of the security team have been instructed to report  ______________  unattended bag to the local police department.

• Don’t forget ___________ the door before ____________ to bed.

• Tom and Ann stood in front of the mirror and looked at_______ 

• Advanced technologies may make humanity insignificant both in life and work.