________ around the Water Cube,we were then taken to see the Bird’s Nest.
A.Having shown B.To be shown
C.Having been shown D.To show
I have ______ all the papers but I still can’t find my notes.
A.looked for B.looked through
C.looked after D.looked out
_____in the sports world,a sportsman needs to train constantly to keep himself in best condition.
A.Survive B.Surviving
C.To survive D.Survived
Teenagers ________ their health because they play computer games too much.
A.have damaged B.are damaging
C.damaged D.will damage
Peter’ shirt looked just the same as Tom’s,but it cost ______ his.
A.as much twice as B.twice as much as
C.much as twice as D.as twice much as
We can’t figure out ______ quite a number of insects and birds are dying out.
A.that B.as C.why D.when