Which of the following is the oldest~ sport in the United States（）

单项选择题（）around the Water Cube, we were then taken to see the Bird's Nest for the 2008 Olympic Games.

A. Having shown
B. To be shown
C. Having been shown
D. To show

单项选择题The phenomenon that words having different meanings have the same form is called（）

A.hyponymy
B.synonymy
C.polysemy
D.homonymy

单项选择题One Friday, we were packing to leave for a weekend away（）my daughter heared cries for help.

A. after
B. while
C. since
D. when

单项选择题I always wanted to do the job which I'd been trained（）

A. on
B. for
C. by
D. of

单项选择题Cindy shut the door heavily and burst into tears. No one in the office knew（）she was so angry.

A. where
B. whether
C. that
D. why

单项选择题Bats are surprisingly long-lived creatures, some（）a life span of around 20 years.

A. having
B. had
C. have
D. to have

单项选择题The issue is how to（）of radioactive waste.

A. deal
B. dispose
C. disposal
D. do

单项选择题I'm tired out. I（）all afternoon and I don't seem to have finished anything.

A. shopped
B. have shopped
C. had shopped
D. have been shopping

单项选择题Let's learn to use the problem we are facing（）a stepping-stone to future success.

A. to
B. for
C. as
D. by

单项选择题Experts think that（）recently discovered painting may be（）Picasso.

A.the；不填
B.a；the
C.a；不填
D.the；a