单项选择题

You can take anything from the shelf and read, but please () the books when you've finished with them.

A. put on
B. put down
C. put back
D. put off

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Susan wants to know whether the measures have been agreed ().

A. to
B. with
C. over
D. upon
单项选择题
Other medical technology groups are working on () telemedicine to rural care.

A. applying
B. supplying
C. replying
D. implying
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