单项选择题

The building of the new subway lines in the city has been ______due to lack of enough in- vestment.

A．held up
B．held on
C．held out
D．held back
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单项选择题
The government has______ a series of policies to ensure its sustained development in economy.
A．reserved
B．issued
C．stated
D．expressed
单项选择题
The manuscript, circulated to publishers last month, ______an outburst of interest.
A．flared
B．caused
C．aroused
D．flashed
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