单项选择题

Our school-run factory ______ various kinds of chemical devices last year.

A. turned into B. turned up
C. turned out
D. turned off

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单项选择题

Mass production has made ______ the goods and services we want at a lower price.

A. possible for us to get
B. it is possible for us to get
C. it possible for us to get
D. possible it is for us to get

单项选择题

Henry and Bady ______ to the parties at the trade union every Saturday.

A. are used to go
B. use to go
C. used to go

D. were used to go

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