The origins of human speech remain a mystery,__________ we have a fairly accurate idea of when writing began.

题目
The origins of human speech remain a mystery,__________ we have a fairly accurate idea of when writing began.

A. once
B. if
C. though
D. since
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相似问题和答案

第1题:

We may conclude from the text that .

[A] human cloning will not succeed unless the technique is more efficient

[B] scientists are optimistic about cloning technique

[C] many people are against the idea of human cloning

[D] cloned animals are more favored by owners even if they are weaker


正确答案:A
细节题。文章一开始就引用专家威斯苏森的话,指出克隆人是愚蠢的尝试。第二段最后两句提到,克隆实验的低效性和危险性在克隆人中不可接受。文章末尾再次引用该专家的话,指出现在动物的克隆研究还没完全成功,没有必要想到克隆人。由此可见,技术是克隆实验存在的主要问题,也是阻碍克隆人实验的重要原因,因此可推知[A] 正确。[B] 明显错误,科学家并不乐观。全文只涉及专家和拥护克隆实验的人的观点,因此无法推知[C] 中的“许多人”。[D] 在文中没有提及。

第2题:

I have no idea()to make my speech interesting.

A. how

B. why

C. when


参考答案:A

第3题:

our writing in the g time. After that, we have to check our 79.


正确答案:
79. given

第4题:

Only when we hurried to the airport __________the fight was canceled.

A.we found
B.did we find
C.have we found
D.we have found

答案:B
解析:
考查倒装句。0nly和所修饰的副词、介词短语或状语从句位于句首时,要用倒装语序,因此排除A和D。根据句意“当我们匆忙赶到机场时才发现航班已经取消了”.可知句子是在陈述过去的事实,故选B。

第5题:

according to sir richard paget, the right order of development of human communication is __________.

A、sounds, food, hunting, writing, gambling, online chatting

B、gestures, eye movements, writing, speech., telegraph, internet

C、shouting, whispers, hands movements, horse riding, computers

D、gestures of the hands, gestures of the mouth, whispered, voiced speech


参考答案:D

第6题:

Field is related to how we communicate, through speech or writing.()


参考答案:错误

第7题:

We have to stay at home for a whole day. Why not go out and have a walk?()

A. It likes a good idea.

B. It sounds like a good idea.

C. How is a good idea?


参考答案:B

第8题:

What is the main idea of the man's speech?

A.Everything at State University has changed in the past ten years.

B.Although the campus looks the same, some things have changed at State University.

C.In spite of the changes on the campus, the commitments of the State University remain the same.

D.Everything has stayed the same at State University during the past ten years.


正确答案:C

第9题:

We have kept( )our friendship by writing to each other, so we are true friends.

A. back

B. up

C. off

D. down


正确答案:B

第10题:

The origins of human speech remain a mystery,__________ we have a fairly accurate idea of when writing began.

A.once
B.if
C.though
D.since

答案:C
解析:
考查连词辨析。句意为“我们对于写作的起始有了相当准确的观点,演讲的。起源仍然是个谜团”。根据句意.前后表转折.故选C。

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