[填句补文]The Caribbean Islands form a chain that separates the Caribbean Sea from the rest of the Atlantic Ocean. ________. Many of the islands were formed by the eruption(爆发)of ancient volcanoes(火山)。Others are low-lying coral islands that gradually rose from the ocean.
A、They are famous for their warm， tropical climate and great natural beauty.
B、What would you see if you took a cruise to the Caribbean Islands?
C、They‘re like a long necklace that stretches between North and South America.
D、But life on the Caribbean Islands is not always paradise.
答案解析：第一句话说的是：加勒比群岛形成了一个锁链，把加勒比海与大西洋的其他部分分开。答案是C，因为它的第一个词是"They"，该词指"The Caribbean Islands";而且在语义上也有很好的衔接。
[填句补文]The future is much too important to simply guess about， the way the high school students did. ________ by carefully studying the present， skilled businessmen， scientists， and politicians are supposedly able to figure out in advance what will happen.
A、The stock market had its worst losses ever
B、Buildings would rotate so they could follow the sun to take maximum advantage of its light and heat
C、So experts are regularly asked to predict accurately
D、The article was written in 1958