课时同步（重大版）高一下英语必修3Unit6-1

翻译下列词组
远到，直到
关系重大
毫无疑问
为…叹气
嘲笑
不止一次
想起、记得
取决于，依靠
决定采用，选择
值得做…
据我所知

I can’t repair these until tomorrow, I am afraid.
That is ok. There is         .

Some researchers believe that there is no doubt       a cure for AIDS will be found.

—The weather is not good enough for the basketball match，is it？
—Not at all. We can’t have       at this time of the year.

When I got on the bus, I         I had left my wallet at home.

—Hey，look at that girl with long hair. What a beauty!
—       ! Here comes a bicycle.

        seems strange to us is       the troublesome boy is getting on well with all his teachers.

There was so long a queue for drinks at the interval that they       gave up.

It was a pity that the famous painter died        his painting unfinished.

Whatever is left over may be put into the refrigerator,        it will keep for two or three weeks.

I can never forget the days         we worked together and the days         we spent together.

With the help of the German experts，the factory produced         cars in 2005 as the year before.

The young mother saw her baby fall to the ground，        brought her heart to her mouth.

That’s such a well-known place   everyone wants to visit       we can find it in the map of the world.

David apologized for         to inform me of the change in the plan.

We trust you；only you can         him to give up smoking.

—I heard Back Street Boys would sing at the New Century Theater.
—Where did you       ？

—Tom，you are caught late again.
—Oh，       .

A recent study of ancient and modern elephants has come up with the unexpected conclusion that the African elephant is divided into two distinct (不同的) species.
The discovery was made by researchers at York and Harvard Universities when they were examining the genetic relationship between the ancient woolly mammoth and mastodon to modern elephants—the Asian elephant,African forest elephant,and African savanna elephant.
Once they obtained DNA sequences (序列) from two fossils (化石)，mammoths and mastodons,the team compared them with DNA from modern elephants.They found to their amazement that modern forest and savanna elephants are as distinct from each other as Asian elephants and mammoths.
The scientists used detailed genetic analysis to prove that the African savanna elephant and the African forest elephant have been distinct species for several million years.The divergence of the two species took place around the time of the divergence of Asian elephants and woolly mammoths.This result amazed all the scientists.
There has long been debate in the scientific community that the two might be separate species,but this is the most convincing scientific evidence so far that they are indeed different species.
Previously,many naturalists  believed that African savanna elephants and African forest elephants were two populations of the same species,despite the elephants’ significant size differences.The savanna elephant has an average shoulder height of 3.5 metres while the forest elephant has an average shoulder height of 2.5 metres.The savanna elephant weighs between six and seven tons,roughly double the weight of the forest elephant.But the fact that they look so different does not necessarily mean they are different species.However the proof lay in the analysis of the DNA.
Alfred Roca,assistant professor in the Department of Animal Sciences at the University of Illinois,said,“We now have to treat the forest and savanna elephants as two different units for conservation purposes.Since 1950,all African elephants have been conserved as one species.Now that we know the forest and savanna elephants are two very distinctive animals,the forest elephant should become a bigger priority(优先) for conservation purposes.”
One of the fossils studied by the researchers is that of            .

The underlined word “divergence” in Paragraph 4 means “           ”.

The researchers’ conclusion was based on a study of the African elephant’s           .

What are Alfred Roca’s words mainly about?

Which of the following can be the best title for the passage?