Mr. Ma is our science  1  . His class is very interesting. We can learn  2   from his  3   .We like him very much. He often  4   us make things. We make a lot of different things.  5  of us make model planes. Some make model boats. Others make robots. Look at that robot! We like  6   very much,  7   it can do many things  8   us. It is now   9   the windows of an office building. It is not easy for workers to do this job, because it is a very  10   building. It is dangerous for people to do the work. The robot is a great help.

(    ) 1.A. teach          B. teaches        C. teacher        D. teaching

(    ) 2.A. a lot          B. lot           C. lots          D. lots of

(    ) 3.A. class          B. home         C. school         D. family

(    ) 4.A. help           B. helping       C. helpes         D. helps

(    ) 5.A. One           B. Some         C. Other         D. Boy

(    ) 6.A. them          B. it            C. its           D. it's

(    ) 7.A. because        B. but          C. so           D. and

(    ) 8.A. with          B. to               C. for           D. from

(    ) 9.A. cleans         B. clean         C. cleaned       D. cleaning

(    ) 10.A. big          B. tall          C. short         D. small

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