11．He was late as_a_result of the snowstorm.

　　Ⅲ.句型转换

　　1．The weather was even colder as the wind was blowing.

　　The weather was even colder with the wind blowing.

　　2．The bus was held up by the snowstorm and it caused the delay.

　　The bus was held up by the snowstorm, which_caused the delay.

　　The bus was held up by the snowstorm, causing the delay.

　　3．He could dive as deep as 50 metres in the sea.

　　He could dive to a_depth_of 50 metres in the sea.

　　4．Much to my delight, I could do the work more easily.

　　Much to my delight, I found the work easier_to_do.

　　5．He didn't finish his homework until midnight.

　　Not_until midnight did_he_finish his homework.

　　It was not_until midnight that he finished his homework.

　　Ⅳ.单句改错

　　1．The annually rings of the tree can tell us how old the tree is.

　　annually→annual

　　2．The scientists adapted them to their new life in the Antarctic.

　　them→themselves

　　3．This young man enjoys setting feet on inhospitable places.

　　feet→foot

　　4．The huntsman aimed his gun for the wolf and fired, but missed it.

　　for→at

　　Ⅴ.完形填空

　　So far, about 27 countries have visited Antarctica for scientific research. Hard __1__ the living conditions are, many scientists __2__ to stay there for long periods of research.

　　 So, how do they manage their lives on the ice?

Well, during the __3__， the temperature in Antarctica reaches about －20℃. It falls to about －60℃ in winter. So, __4__ there are 24 hours of sunshine, scientists must keep wearing all the correct clothes to __5__