CLOZE1
In a zoo, tigers are seen ___1.___ meat. The tiger is a ___2.___ animal, so you may be told not to __3.____ it. However, it is also a very ancient animal.
Tigers are less closely related to lions, leopards, and jaguars than these other big cats are to each other, according to a new study. __4.____ inthe tiger, scientistshave found that it began evolving 3. 2 million years ago, and its closest living relative is the
__5.____ endangered snow leopard, which is threatened by ___6.___. Despite the popularity and endangered status of tigers, much remains to be ___7.___ about them, ______ how they evolved. It has long been known that the five species of big cat—the tiger, lion, leopard, jaguar, and snow leopard—and the two species of clouded leopard are more closely related to each other than to other smaller cats. But it has been difficult to pin down the exact ______ between and among them. So scientists have ______ to find out more for a long time. They have already conducted an analysis of the DNA of all these species.
7.( B ) (A) covered (B) discovered (C) recovered (D) uncovered
問題：1.（7）前面的much代表什麼意思呢？
2.（7）這題放（B），discover在這邊代表什麼意思呢？→這樣整句翻起來是什麼意思呢？
為什麼不能用uncover呢？
謝謝。
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