单项选择题

The author thinks that pull factors

A．are all related to economic considerations.
B．are not as decisive as push factors.
C．include a range of considerations.
D．are more important than push factors.

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单项选择题

The purpose of the passage is to discuss

A．the problems of international migrants.
B．the motives of international migrants.
C．migration inside the country.
D．migration between countries.

单项选择题

Children in hospital usually turn to__________in order to catch up with their school work.

A．hospital teachers
B．schoolmates
C．parents
D．school teachers