单项选择题

Section B
Passage One

A．What the US patent system was about.
B．How the US patent system encouraged technology and creativity.
C．How the US patent system protected Americans.
D．The reasons for the patent system.
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单项选择题
A．Buy Mary a ring.B．Tell Mary about the ring.C．Tell Mary about the volunteer meeting.D．Call Mary before each meeting.
A．Buy Mary a ring.
B．Tell Mary about the ring.
C．Tell Mary about the volunteer meeting.
D．Call Mary before each meeting.
单项选择题
A．They are grateful students.B．They are brains .C．They are hard-working students.D．They are fun people.
A．They are grateful students.
B．They are "brains".
C．They are hard-working students.
D．They are fun people.
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