三、综合填空
While most people are learning to sort（分类）rubbish, a student in Hangzhou does something more than that—designing a smart bin by (1)
himself
(he).
Jiang Haotian is (2)
an
eighth grader. His smart bin is made up of two small bins, each (3)
with
a cover on its top to open or close. The bin can follow people's (4)
instructions
(instruct). For example, when people say “recyclable waste（可回收垃圾）” or “unrecyclable waste”, the correct one out of the two small bins (5)
will open
(open). When it's full of rubbish, the bin won't open. In this way, it won't smell terrible like the old ones on the streets. Also, it will make a loud sound (6)
if/when
someone throws burning things in it.
Jiang (7)
thought
(think) of the idea of making a smart bin to sort rubbish when he was in Grade Five. He took a course which taught him to programme（编程）and started to design one.
(8)
To make
(make) the dustbin as perfect as possible, Jiang wrote lots of codes（代码）. And he visited different places and asked for advice. After three years of hard work, he (9)
finally
(final) completed his design. He is proud that he can do something for the environment. He hopes more people can join him and make the earth (10)
cleaner
(clean) and prettier.
