Leif Erickson reached North America around the year 1000, but the attempt to explore was started slowly. It would be five centuries _______ other Europeans landed on that continent.
Why were Europeans the ones to _______ to the American? The Chinese and Arabs had the _______ and technology to sail across the seas. _______ of them tool regular voyages in the Indian Ocean and the Asian Pacific for trade. But exploration? By the mid-15th century China had followed the closed-door policy to _______ itself from the rest of the world. The Arabs, with access to the minerals and spices (香料) of Africa and the Far East, saw no _______ to journey into the unknown.
Europe _______ needed gold and silver; its mines could not meet the demand for coinage. Ottoman Turks blocked the routes across the land to Asia. Only the sea held the _______ of new wealth.
With the return of Magellan’s ships in 1522 from its voyage around the world, the belief was _______ that the oceans were interconnected, promising the age of discovery. The English, as well as the Spanish, Portuguese and French, ________ themselves to finding the “river of the west” through North America to the east.
1.A.after B.since C.before D.when
2.A.push B.pull C.draw D.drive
3.A.sources B.resources C.substances D.matters
4.A.Neither B.Both C.Any D.None
5.A.prevent B.protect C.isolate D.differ
6.A.access B.admission C.application D.association
7.A.as a matter of fact B.in other words C.for one thing D.on the other hand
8.A.symbol B.impression C.promise D.reflection
9.A.extended B.estimated C.attracted D.accepted
10.A.contributed B.devoted C.referred D.connected
They were our school’s volunteers ________ to help elderly people cross the streets every day.
A.whose task it is B.it is whose task
C.to whom is the task D.whose task was
We have come to realize that the brain must “ forget” some pieces of information it can remember others.
A.when B.since C.so that D.if
They will not allow others to decide the future of their country,___ .
A.which is to be known B.as is to be known
C.as is known to all D.as what is known to all
, the climbers, who had already conquered many high mountains before, determined to reach the top of the mountain.
A.However it was high B.How high it was
C.However high it was D.However high was it
No one can tell the exact number of U.S. pilots and fighter planes were lost in the Pearl Harbor air attack.
A.who B.which C.that D.what