（1）Who built a robot named Wakamaru？
A.Japanese engineers.
B.Russian engineers.
C.American engineers.
（2）Why did they build Wakamaru？
A.To help and serve people.
B.To relax.
C.To have fun.
（3）How many words does Wakamaru know？
A.10，000.
B.100.
C.1，000.
（4）At night，what can Wakamaru do if there is any danger？
A.Walk out.
B.Wake up the family.
C.Wash face.