2．I'm worried my homework．( )A．becauseB．soC．because ofD．as——青夏教育精英家教网——

2．I'm worried my homework．（　　）

1．We humans can play the piano．Of course we play the piano with our ten fingers．（51）D Teotronico is not a human．It is a robot．
Matteo Suzzi is the inventor of Teotronico．Matteo Suzzi comes from Italy．（52）A He was interested in science when he was young．He always likes to use his head to create new amazing things．（53）E He made the piano-playing robot at a cost of about 4700．
（54）B It has more fingers than humans．It olays the piano faster than a human．Teotronico can sing as well when it plays the piano．（55）C Teotronico can even use its eyes to interact with humans because there are cameras in its eyes．Teotronico is amazing，isn't it？
A．He is more than thirty years old．
B．Teotronico is a special and great robot．
C．It is the first robot to do so and many people feel excited to see it．
D．But Teotronico can play with its 19 fingers．
E．He spent four years making the musical robot．

20．---Joe，keep ________ on your homework and keep __________．（　　）

	A．	working； quiet		B．	to work；quietly
	C．	working；quietly		D．	to work； quietly

19．After a whole day's work，why not stop ________ a rest？（　　）

18．I think the _______ lesson is more difficult than the ________．（　　）

	A．	ninth； twentieth		B．	nineth； twenty
	C．	nineth； twentieth		D．	ninth； twenty

17．All of us became very _________ when arriving at the top of the mountain．（　　）

16．He will walk by the beach instead of ____________ in the sea．（　　）

15．If you don't know the meanings of these new words，you can ________ in the dictionary．（　　）

14．We can see _____________ stars in the sky at night．（　　）

13．Who is the __________ at Physics，Bob，Tom or Jack？（　　）

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