单项选择题

53（）

A．affect
B．adopt
C．avoid
D．express

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单项选择题

The researchers checked how well the test subjects’ insulin worked by measuring（）

A．the blood sugar level in their bodies.
B．the length of time they could cycle in one breath.
C．the amount of sugar their muscles could make use of.
D．the amount of insulin they took.

单项选择题

In administering first aid to a victim, you should first of all（）

A．remove him from the accident scene.
B．turn him over
C．call for professional medical help
D．examine him care fully