_______ pipelines are expensive to build, they are relatively cheap to operate and maintain.

_______ food we eat lacks minerals, then the body an use the stores from its bones for more urgent needs.

Pheasants spend most of their time on the ground, _______ many species perch in trees at night.

It sounds like something wrong with the car's engine_______, we'd better take it to the garage immediately.

No one _______ Kathy knows very much about it.

We didn't go to Paris. We went to Rome_______

Galaxies are composed of millions of individual stars_______ are so far away that they appear as single pints of light.

We should be firm_______ patient in this case.

Internet is a very fast_______ convenient way for us to get information.

_______ Marge, three couples are invited

Some birds, _______ robins and cardinals, spend their winter in the North.

All of the students_______ the seniors will receive their grades in two weeks.

It's raining, _______ I can't go to the beach.

An effective paragraph must _______ be unified and ordered but also complete.

The flight was canceled_______ the weather conditions were bad.

It was still painful, _______ I went to see a doctor.