单项选择题

Arctic explorers may catch colds when ______.

A．they are working in the isolated arctic regions
B．they are writing reports in terribly cold weather
C．they. are free from work in the isolated arctic regions
D．they are coming into touch again with the outside world

<上一题目录下一题>

热门试题

单项选择题

In the writer's real opinion, Kanai

A．is not worth visiting at all
B．is well worth visiting
C．is not a beautiful island
D．is a dangerous island

单项选择题

It can be learned from the text that ______.

A．Kauai is an island near the Hawaiian Islands
B．Kauai is another name of the Hawaiian Islands
C．Kauai is one of the Hawaiian Islands
D．Kanai does not belong to the Hawaiian Islands