( )1. A. 11 billion . B.1.3 billion. C.1.1 billion.
( )2. A.Yes, but she uses it slowly. B.Yes,and she can use it very quickly.
C.Yes,she is able to use it with her teacher’s help.
( )3. A.1/5. B.3/5 C.3/10.
( )4. A.Three. B.Four. C.At least three or four.
