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Through his extensive research into acquiring language skills, Dr. Harvey Ward has proven ___________   to be a leader in field .

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By the time we get to the conference about wildlife protection, the opening speech __________.

One of the. ..............international research facilities in botany is located at the Hoskin Museum of Natural History.

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The automotive company ___________   pursued technologies that would improve the efficiency of its engines.

I have a message for people ............... by the traffic chaos.

Many of these songs deal ________ important social issue, such as racial integration and the war in Vietnam.

It is _______ he is very proud of. 

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My best friend advised me __________ more information about the company offering the job.

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The balconies connected to the rooms at the Orwell Hotel provide a  _______________  view of a private beach.

Astronomers have ____ a new planet outside our galaxy.

Clayton Books hired some extra staff since setting up the store's website, so online orders can be handled ................

Unless specified .............., contractors will be responsible for obtaining all necessary safety certification and permits applicable to their scope of work.

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The woman...... to the headmaster will make a speech about protecting the environment.

The total income of many smaller clothing retail franchises reaches .................... $20 million annually.

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Everyone was attracted by her grateful __________ .

Is Miss Wilson very fond ............... French food? - No, she is not used  ................. having French food.

Choose the best answer among A, B, C or D that best completes each sentence: …… the secret of how to make silk remained inside Asia, Europeans were forced to pay incredibly high sums of money for this mysterious material to be brought overland to Europe.

The girl you __________ yesterday is waiting for you at the gate.

I couldn't use the pay phone                  I didn't have any coins with me.

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Environmentalists were pleased with the community's ______________  in increasing recycling in the area.

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The child should .............. because of his bad behavior.