Identify the error in each sentence: According to scientists (A) who study birds, (B) upon hatching, (C) ducklings have already known to swim (D)

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When will we leave? ................ he finishes his task.

The Wright brothers, owner of a bicycle shop, used a number of bicycle parts to make the original motorized plane.

Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following question.

I couldn't make out what he had talked about because I was not used to his accent.

When actively hunting, a dolphin sends out transmitting about five signals every second.

Many teenagers are not much ________ in reading books, except for what they are made to read at school

In about, experimental psychologists have devoted more research to learning than to any other topic.

Of the two lectures, the first was by far the best, partly because t person who to delivered it had such a dynamic style.

You pay about $50 per person and can having dinner and breakfast there.

It’s a serious operation for a woman as old as my grandmother. She is very frail . I hope she ..................

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Mary really fancies _____________ detective books, _________ genre of book about excellent detectives and cruel criminals.

Snapping turtles are easily recognized because of the large head, the long tail and the shell that seems unsufficiently to protect the body.

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The little boy felt very........... because his parents did not let him go with them.

In the future, we will certainly lead a more healthier life.

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He finds it difficult ____________ Tolstoy’s novel named “War and Peace”.

Identify the error in each sentence: A fully grown male mountain lion may be eight long feet

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The evening was spent ............................. 

Thanks to a considerable number of material data, we know pretty much about ancient Egypt, but few historical records of Babylon are available.

It is believed that the more frequent you exercise, the greater physical endurance you will have.

Fishing in the reservoir is ............... prohibited.

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Farmers need to .........crops.