单项选择题
Effective prevention against physical harms has never been ______ urgently needed, especially in schools.
- A．more
B．as
C．such
D．quite
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单项选择题
People who walk on the grass are ______ to a fine of $5.
A．possible
B．likely
C．liable
D．reliable -
单项选择题
Dr. Hawking has made much contribution to the theories of modem physics at the ______ of his health.
A．cost
B．disposal
C．mercy
D．expenditure -
单项选择题
John Smith, being a diligent student, never refuses to ______ more responsibilities that are assigned to him.
A．take up
B．take in
C．take off
D．take on
