[填空题]Every October, when the surface of the Arctic ______ is covered with ice, the California grey whales set off on their long journey south to their breeding grounds.

[填空题]Every October, when the surface of the Arctic ______ is covered with ice, the California grey whales set off on their long journey south to their breeding grounds.

[单项选择]

It was late at night on October 10, 1939, when Dr Bethune was busy working in a field hospital. An Eighth Route Army soldier came and told Dr Bethune that the front was in great need of medical care. Dr Bethune set off with a medical team at once.
On their way, they met a group of wounded Eighth Route Army men. They took the wounded soldiers into a small temple at once and Dr Bethune began to operate on them.
Dr Bethune went on working all the night.
The next day while an operation was going on, a young man ran in and said to the doctors, "Several hundred enemy soldiers are coming." Soon they heard the sound of gunshots. But Dr Bethune still went on with his work.
Twenty minutes later, when Dr Bethune was operating on the leg of the last wounded soldier, the gunshots sounded much closer. This time the young man rushed in and told Dr Bethune not to go on operating any more. "Dr Bethune, you must leave now!" he cried.
&quo
A. An Eighth Route Army soldier.
B. A doctor.
C. A Japanese scientist.
D. A firmer.

[单项选择]The Space Age（）in October 1957 when the first artificial satellite was launched by the Soviet Union.
A. initiated
B. originated
C. embarked
D. commenced

[简答题]Arctic Sea

[填空题]Arctic kayaks

[填空题]When will the lectures be held on October 27 to 297
From ______.

[单项选择]When does the author usually work every day
A. From 1 p.m. to 9 p.m.
B. From 8 a.m. to 4 p.m.
C. From 8 a.m. to 9 p.m.

[单项选择]When does the man get up every morning
A. At 7: 10.
B. Before 7: 10.
C. At 8:00.

[单项选择]The Arctic fox is found throughout the Arctic, usually on tundra or mountains ______ the sea.
A. by which near
B. near of
C. because near
D. near