单项选择题

A．It is a form that helps the student get a student visa.
B．It is a certification about the student’s English proficiency.
C．It is a certificate that shows the student’s education experience.
D．It is a reference letter that helps the student get in the US embassy.
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单项选择题
A．He could afford the business class. B．He prefers to fly economy class. C．He would rather fly business class. D．He refuses to travel by air.
A．He could afford the business class.
B．He prefers to fly economy class.
C．He would rather fly business class.
D．He refuses to travel by air.
单项选择题
37（）

A.according
B.carefully
C.contributing
D.corresponding
E.death
F.decision
G.enduring
H.general
I.injected
J.patients
L.repeatedly
M.seek
N.suffering
K.recognized
O.traced
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