As is known to us all, _____ tiger is in _____ danger of becoming extinct.

A. the, a  B. the, 不填  C. a, 不填     D. 不填, the

下面是一篇文章，请将标有A-F的段落插入文章中标号为1- 5的合适位置，使这篇文章意义完整，结构连贯；其中有一个段落是多余的。

A punctual （准时的）person is in the habit of doing a thing at the proper time and is never late in keeping an appointment.

      __1._____He is always in a hurry and in the end loses both time and his good name. A lost thing may be found again，but lost time can never be regained. Time is more valuable than material things.__ 2.______.The unpunctual man is for ever wasting and mismanaging his most valuable assets as well as the assets of others'. The unpunctual person is always complaining that he finds no time to answer letters or return calls or keep appointments promptly.____ 3.___. He knows that he can not get through his huge amount of work unless he faithfully attends to every piece of work when it has to be attended to .

Failure to be punctual in keeping one's appointments is a sign of disrespect towards others. If a person is invited to dinner and arrives later than the appointed time，he keeps all the other guests waiting for him. ___4._____.

Unpunctuality，moreover，is very harmful when it comes to doing one's duty，whether public or private. Imagine how it would be if those who are put in charge of important tasks failed to be at their proper place at the appointed time.__ 5.__

A. But the man who really has a great deal to do is very careful with his time and seldom complains because he lacks it.

B. The unpunctual man，on one hand，never does what he should do ahead of time.

C. In fact，time is life itself.

D. A man who is known to be habitually unpunctual is never trusted by his friends or

fellow men.

E. The unpunctual man，on one hand，never does what he has to do at the proper time.

F. All guests present ought to be respected by the host.

G. Usually this will be regarded as a great disrespect to the host and all other guests present.

 _____ is known to everybody, the moon travels round the earth once every month.

A. It    B. As        C. That       D. What

_________ is known to us all is that the 2008 Olympic Games will take place in Beijing.

1. A.
   It
2. B.
   What
3. C.
   As
4. D.
   Which

It is known to all that         you exercise regularly , you won’t keep good health .

    A．unless         B．whenever       C．although       D．if