20. A 从句子结构上判断，此句有三个并列的谓语动词；同时注意修饰动词要用副词不能用形容词。
7
It is already home to whales, seals and polar
bears, but soon the Arctic (北极) must find __1__
for some Chinese visitors.
A team of
nine scientists will __2__ to the Arctic this month to mark the opening
of China's __3__ Arctic scientific research station, SOA (the State Oceanic
Administration (国家海洋局) has __4__.
Construction of the station finished a while
__5__, but operations were held __6__ during the polar night, __7__ normally
runs from late October to the end of February. __8__this period, the sun never
__9__ over the Arctic. And from mid-July to
the end of August, the sun never sets, a time__10__ as polar day (极昼).
With territories (版图) __11__
far up into the northern half of the globe, China __12__Arctic studies to learn
__13__ about its climatic and environmental changes. Many of these, __14__ sand
storms and heavy droughts, are believed to have __15__ to do with the Arctic.
Research teams __16__ the area in 1999 and 2003,
but the new station will allow scientists to study the Arctic
in __17__ depth.
The station
is a two-storey building and __18__ a laboratory, office, reading room, bedroom
and storeroom. It can hold 20 to 25 researchers.
"It will be __19__ great support to the
scientists' research there," said Xia Limin, an
officer in SOA.
This year the SOA also plans to upgrade (提升) two existing scientific bases in the Antarctic
(南极洲). They are "Great
Wall", which was set up in 1985, and "Zhongshan",
__20__ five years later.