............. winter is usually cold, but .................. winter of this year is warm. 

The pleura that cover the exterior of the lungs and the inner walls of the chest cavity is a thin elastic membrane.

To survive , most birds must eat at least half their own weigh in food every day

A majority students in this university are from overseas.

He seldom goes to the park, _    ?

To receive a degree from an American university, one must take many courses beside those in one’s major field.

Don't leave here, _    ?

Hurry! We're got to leave the house immediately. Otherwise, __________ the opening ceremony. 

The homes created by the legendary architect Frank Lloyd Wright are still viewed as uniquely innovative, and valuable.

Under the crust of the Earth are bubbling hot liquids that sometime rise to the surface.

The dentist gave me a check-up and then telling me I needed two teeth.

Light rays what enter the eye must be focused onto a point on the retina in order for a clear visual image to form.

Salt was once too scarce and precious that it was used as money.

The film we saw last night was different from that I had expected.

Choose the best option:

Certain chemicals have been banned because of their damaging effect on the environment.

As her focus changed, the love poetry that Edna St, Vincent Millay produced in the 1920’s increasing gave way to poetry dealing with social injustice

I think he will come here, _    ?

Canada is made up of ten provinces and two territories, with governmental powers being divided between the federal government or the provinces.

Her application for a visa was turned down not only because it was incomplete and incorrectly filled out but also because it was written in pencil

The oxygen in the air we breathe has no tasted, smell, and color.

Among the parameters that determine whether an environment is suitably for life as we know are temperature, water availability, and oxygen content.