从下列各句四个选项中选出一个最佳答案，将相应的字母填在答题纸相应的位置上。

1. Make sure the label is firmly ______ to the parcel before you mail it.

  A. attributed          B. accustomed         C. adjusted          D. attached

2. ______leisure was generally considered a waste of time.                                                       

  A. Not until recently                      B. Not recently

  C. Until recently                          D. Recently until

3. Man's greatest energy comes not from his physical strength ______ his dreams.

  A. except from         B. yet from           C. however from       D. but from

4. It is ______ to avoid rich foods if you are feeling ill.

  A. senseless           B. sensible           C. sentimental       D. sensitive

5. If you are walking away from a clock tower, you will hear the ticking of the clock fade to a point ______ it cannot be heard.

  A. which               B. what               C. where             D. how

6. The moon turns round the earth, just ______ the earth circles round the sun.

  A. therefore           B. as                 C. thus               D. so

7. He said he was ______ the origin of the universe.

  A. speculating upon                        B. coinciding with