单项选择题

A．Wearing arm weights while you are swimming.
B．Jogging vigorously in one place for a long time.
C．Using bicycles that require you to use both your arms and legs.
D．Walking slowly while swinging your arms back and forth.
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单项选择题
A．He sent surgeons to serve in the army.B．He provided soldiers with medical supplies.C．He recruited volunteers to care for the wounded.D．He helped to flee the prisoners of war.
A．He sent surgeons to serve in the army.
B．He provided soldiers with medical supplies.
C．He recruited volunteers to care for the wounded.
D．He helped to flee the prisoners of war.
单项选择题
A．Air traffic conditions.B．Traffic jams on highways.C．Road conditions.D．New traffic rules.
A．Air traffic conditions.
B．Traffic jams on highways.
C．Road conditions.
D．New traffic rules.
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