He is so shy that he often feels e____________ about making speeches in public.

It was so e__________ when he found that he didn’t have a single penny in his pocket when the time came to pay the bill.

This newly-built centre is stocked with modern technical              (设备) for

       environmental research.

My grandparents prefer to live in the countryside. They say people living in the city get less f______ air than those in the country.

It is well-known that _______(埃及人) built many pyramids for their kings and queens many years ago.

The aircraft was able to fly over the _______(无尽的) white plains without difficulty.

Smoking is f_________ in our library, so if you want to, please go out.

The Chinese g_______ is worried about the serious pollution.

With the development of science and technology, fewer people believe the e   ▲    of

life on the Mars.

With the climate becoming worse and worse, people g_____________ realize the importance of protecting forests.