That the plates are moving is now beyond dispute. Africa and South America, for example, are moving away from each other as new material is injected into the sea floor between them. The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth’s interior.
68.That Africa and South America were once joined can be deduced from the fact that ________.
[A] the two continents are still moving in opposite directions
[B] they have been found to share certain geological features
[C] the African plate has been stable for 30 million years
[D] over 100 hot spots are scattered all around the globe
解析：
昨天的题目大家做的非常好!
直接定位到这句：
The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined.
词汇：complementary 互补的
句子分析：A and B are reminders of C
A=The complementary coastlines
B=certain geological features that seem to span the ocean
C= where the two continents were once joined
题干：.That Africa and South America were once joined=
where the two continents were once joined
B=certain geological features that seem to span the ocean =
[B] they have been found to share certain geological features
完美的同义替换!
答案B!
