There _____ any sharks in the aquarium.[ ]
A. are
B. aren't
C. isn't
D. is
B
I wanted ______ basketball, but I ______ run fast.[ ]
A. play, could not
B. to play, can't
C. play the, can't
D. to play, could not
在花盆角铁上加工畸形工件时，转速应较高．
