The top of the mountain covered snow during winter.

In the sixteenth century, Francois Vieta, a French mathematician, used the vowels “a”, “e”, “i”to represent a unknown number.

My father still hasn't really recovered from the death of my mother.

While studying the chemistry  of human body, Dr. Rosalyn Yalow won a Nobel Prize for research she conducted on the role of hormones

Since it was so difficult for  American Indians to negotiate a peace treaty or declare war their native language , they used a univere understood form sign language.

Find out error in each sentence: The oil price is believing to be rising again.

If the current and obstacles ____________ a passage too difficult to navigate, a canoeist might make a portage, or carry the canoe over land for a short distance, thereby avoiding the danger.

An electromagnet will remain magnetized only as longer as electricity flow through it

Because of heavy rain, the game was  ...........  for a few days.

A majority  studentsthis university are from overseas 

The most famous alumni of the college were invited to participate the graduation ceremony and related activities scheduled in late May

Scientists are always looking for new _____________ of energy. 

The parcel whi uncle sent me from America containing two books and some tapes

What may happen if John will not arrive in time?

If a person were to look up from the bottom of a deep well, he is able to see stars in the middle of the day.

The Boundary Waters Canoe Area Wilderness and Voyageurs National Park, both ___________ along the border between Minnesota and Ontario, Canada, are two of the most popular canoeing areas in North America.

Find out error in each sentence:  I haven't smoked since a long time.

Georgia has too many types of soil that virtually any temperate-zone crop be grown there

We had to turn .......  their invitation to lunch as we had a previous appointment.

We eally enjoyed the children’s imaginative and excited play last Saturday.

In pools, goldfish are not just ornamental; since they feed on mosquito larva, they are also benefitcal.