"Not all birds can fly"means .
A.All birds can not fly B.No birds can fly
C.None of birds can fly D.All birds can fly
The scientists showed great ______ the warming of the earth.
A.interest in B.love for
C.concern about D.attention for
More strict measures to protect Heihe River Basin in a few years.
A.have been taken B.will be taken
C.were taken D.had taken
﹣﹣Why not go into the classroom?
﹣﹣The door locked.
A.have been B.will be C.has been D.is
If you've ______ those things that seem impossible,you will succeed finally.
A.gone through B.gone over C.gone by D.gone back
I used to have words with my parents,but now we ______ fine.
A.look out B.stay up C.carry on D.get along