Choose the correct answer in each sentence.

As  ______________  by the researchers, environmentally friendly laundry detergent performed as well as its competitors.

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_______ for instance, might find it hard to laugh at a Russian joke.

Your windows need __________. Would you like me to do them for you?

I'll ____ you ____ you to our research department. Please hold on.

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It’s difficult to ……….. the difference between margarine and butter.

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Yesterday’s festival featured some of the most  _____________  dancers that the Palace Theater has ever hosted.

She  stayed at home because her mother was sick.

B

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Portsmouth's agricultural industry has always found ways to ___________   itself by growing different crops and finding new markets.

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--------- for using the hotel's spa and dining services have appeared on the final invoice.

................. the bankruptcy of Transcontinental Airlines, other airlines have noticed an increased use of connecting flights.

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On next week's radio program, our host will interview Kristen Dabney about her time working as an _________   for a UN official.

 The boy insisted on ______________ a break after lunch. 

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If you have already signed up for automatic payments, _____________   no further steps are required.

Find the mistake in each of the following question: 

A novel is a story long enough to fill a complete book, in that the characters and events are usually imaginary.

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.

It is hard to get ____ parts for this car if it goes wrong.

Choose the best answer:
 He _________  several books a month, but he doesn't have time any more.

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-------- joined Vince's Gym, Mr. Pinter could attend group classes and health counseling sessions for free.

I have English classes ________ day ; on Mondays, Wednesdays and Fridays.

There have been ______innovative policies to combat traffic congestion, and as a result, traffic continues to be a major problem

Let me know immediately if you hear any ______________news.