单项选择题

A．call on
B．call for
C．call in
D．call forth
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单项选择题
A．to contractB．being contractedC．contractingD．contract
A．to contract
B．being contracted
C．contracting
D．contract
单项选择题
A．Most facilities will be closed.B．Only a few facilities will be closed.C．Most facilities will operate on a reduced schedule.D．All facilities will be open.
A．Most facilities will be closed.
B．Only a few facilities will be closed.
C．Most facilities will operate on a reduced schedule.
D．All facilities will be open.
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