He wants to be a volunteer teacher in western China when he _______.
#51956
A
takes up
B
puts up
C
grows up
D
makes up
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He has finished writing his new book and it will __________soon.
#52721
A
work out
B
come out
C
go out
D
take out
Food safety is important. Rules _____ to stop people from food pollution.
#52399
A
must make
B
must be made
C
can make
D
can be made