Mr. Smith is our English teacher. We all like his lessons because they are very interesting He is from America. To our surprise, he likes making many things，like model cars. Today he gives us a smart robot(机器人) .It can do many things for us. Look ! It is cleaning our classroom now. It is very easy（容易的） for the robot to do this job. Perhaps(也许) it can clean the windows for us .I think it is dangerous for people to do that .We often call our robot hardworking cleaner.
( )41.What does Mr. Smith do?
A. An English teacher B.A science teacher C.A cleaner
( )42.He gives us a_____.
A. model ship B. robot C. model car
( )43.The robot can clean_____.
A. everywhere B. the classroom C. the windows
( )44.It isn't___ for the robot to clean the classroom.
A. easy B. hardly C. difficult
( )45.What do we call the robot?
A.A worker B. An assistant C.A cleaner